source: sasview/installers/README-next-release.txt @ 187a4a07

Release Notes
=============

1- Features
===========
    - New in Version 4.2.0
      --------------------
      This release heralds many improvements and a host of bug fixes, along with
      some significant changes from previous versions. Further, as promised, it
      marks the end of support for 32 bit operating systems and is only
      available for 64 bit operating systems.

      With this version the change to the new model API and plugins infrastructure
      begun with 4.0 is essentially complete (though extensions are in the works
      and more are likely they should remain backwardly compatible with previous
      versions of SasView).

      NOTE: Old-style plugin models, including old sum|multiply models will continue
      to be supported (i.e. SasView will be able to run them) in 4.x. However,
      the expectation is that such support will be removed in 5.0 and everyone
      is strongly encouraged to convert their custom models to the new API.

      Finally, the changes to orientation angles and orientational distribution
      definitions are now also complete.

      - Changes
         - The infrastucture for calculating 2D patterns from 3D orientated objects
           has been totally re-factored. It is now more accurate and consistent
           across models.
         - The way that SasView defines the orientation of anisometric and
           aligned objects has been completely overhauled. It now differs from
           previous versions.
         - Plugin models, including sum|multiply models, have completely migrated
           to the new infrastructure. NOTE that 3.x type models as well as early,
           intermediate 4.x type models, including those generated by sum|multiply
           will continue to be supported in 4.x but will likely no longer be
           supported after the move to 5.0.  Users are strongly encouraged to
           migrate any custom models.
         - The NeXus loader has been removed as it is superseded by the NXcanSAS
           standard loader and SasView does not support the treatment of raw
           data.
      - Improvements
         - The accuracy/speed of some numerical integrations have been improved.
         - An orientation viewer tool has been introduced to assist in
           understanding the new orientation framework.
         - Problems with the computation of magnetic scattering from some
           objects have been rectified. Some questions remain however.
         - The known issue with the core_shell_parallelepiped model is now fixed.
         - A number of issues and inconsistencies with the creation of
           sum|multiply models have been rectified.
         - A Boltzmann distribution has been added for polydispersity/orientational
           distributions.
         - Some batch slicing options have been introduced.
         - Correlation function analysis now computes both the 1D and 3D functions.
         - There are several data loading improvements.
         - There are several improvements to Save/Load Project.
         - There have been numerous other bug fixes.
      - Documentation
           Several sections of the help documentation have undergone significant
           checking and updating, particularly those relating to orientation,
           magnetic scattering, and polydispersity distributions. Detailed
           advanced instructions for plugin writing and some scripting
           instructions have been added.
      - Other work
         - A Third-Party initiative has recently succeeded in getting SasView to
           run on Debian. More details at
           http://trac.sasview.org/wiki/DevNotes/Projects/Debian
         - With this release we have started to prepare for the inevitable move
           to Python 3, which will occur with the release of 5.0
         - SasView 5.0 is currently in development. The two most significant
           features of this version will be (i) a move away from the present
           WxPython GUIs to new, completely rewritten, Qt5 GUIs, and
           (ii)implementation of the Beta-approximation for S(Q). Subject to
           resources, some limited access to the latter functionality may be
           available in a future SasView 4.x release.
      - Bug Fixes
         Fixes # 260: Box integration does not update when entering values in dialog
         Fixes # 446: Saving plot as PGF (not PDF!) format throws error
         Fixes # 467: Extend batch functionality to slicer
         Fixes # 489: ABS reader (NIST 1D) does not handle negative dx properly
                      (USANS slit smearing)
         Fixes # 499: create sin(x)/x, 2*J1(x)/x and 3*j1(x)/x functions
         Fixes # 510: Build PDF documentation along with HTML
         Fixes # 525: Add GUI category defaults to models in sasmodels
         Fixes # 579: clean up sasview directory
         Fixes # 597: Need to document Combine Batch Fit
         Fixes # 645: GUI logic problem in Batch vs single fit mode
         Fixes # 648: Need to allow user input background value in Pr perspective
         Fixes # 685: Fix data upload to marketplace
         Fixes # 695: linear slope in onion model
         Fixes # 735: Review new Corfunc documentation
         Fixes # 741: Recalculate P(Q) and S(Q) components on model update.
         Fixes # 767: Sum/Product Models don't do what they should
         Fixes # 776: angular dispersity
         Fixes # 784: Add 3D integral to Correlation Function analysis
         Fixes # 786: core_shell_parallelepiped 1-D model is incorrect
         Fixes # 818: "report button" followed by "save" makes an empty pdf file
         Fixes # 838: Fix model download from marketplace
         Fixes # 848: can't save analysis when only one fit page
         Fixes # 849: Load Folder should ignore files starting with "."
         Fixes # 852: More unit tests, especially for oriented or 2d models
         Fixes # 854: remove unnecessary sleep() in fitting perspective
         Fixes # 856: Reading SAS_OPENCL from custom_config sometimes raises an ERROR
         Fixes # 861: cannot defined a structure factor plugin
         Fixes # 864: New Model Editor (simple plugin editor) error parsing
                      parameter line
         Fixes # 865: Plugin live discovery issues
         Fixes # 866: inform user when NaN is returned from compute
         Fixes # 869: fit page computation thread cleanup
         Fixes # 875: Possible weirdness with 1D NXcanSAS data
         Fixes # 876: Add check for HDF5 format in dataloader
         Fixes # 887: reorganize tree, separating the installed source from the
                      build source
         Fixes # 889: Refactor dataloader error handling infrastructure
         Fixes # 890: use new orientation definition for asymmetric shapes
         Fixes # 891: update docs for oriented shapes with new orientation definition
         Fixes # 896: equations in core shell parallelepiped docs do not match code
         Fixes # 898: Image Viewer Tool file selector issue
         Fixes # 899: Igor Reader q calculation
         Fixes # 902: IgorReader Q calculation needs fixing/improving
         Fixes # 903: sasview - all non-gui tests should be converted to run in Python 3
         Fixes # 906: polydispersity not showing up in tabulated results
         Fixes # 912: About box points to misleading contributors page on Github
         Fixes # 915: load project issues
         Fixes # 916: Proper Logging
         Fixes # 920: Logarithmic binning option in the slice viewer
         Fixes # 921: Improve developer communication methods
         Fixes # 922: Remove support for all data formats that are not in q space
         Fixes # 923: Add CI and trac integrations to Slack
         Fixes # 930: fitting help says chisq is normalized to number of points
         Fixes # 931: Allow admins to edit all models and upload data etc on
                      marketplace
         Fixes # 932: Need to fix upload of data files to marketplace
         Fixes # 934: Slurp tutorial repo for tutorials
         Fixes # 935: Build new tutorials as PDF
         Fixes # 943: Deep copy error on setting model after data is selected
         Fixes # 950: Most of the readers don't close files properly.
         Fixes # 954: cross check dll/opencl/python polydispersity and
                      orientation results
         Fixes # 956: Possible problem with new doc build process
         Fixes # 961: sasmodels tests should fail if the parameter name does not exist
         Fixes # 962: star polymer typo in docs
         Fixes # 967: no uncertainties errors on fitting parameters
         Fixes # 969: About Box not picking up dls_logo.png
         Fixes # 970: ASCII loader doesn't handle ISIS 2D ASCII
         Fixes # 974: blacklist Intel HD 620/630 for double precision
         Fixes # 978: load project fails for pages which have not been defined
         Fixes # 983: Remove Nexus Loader
         Fixes # 984: PDF reports are not being properly generated on Windows
         Fixes # 985: Saving Project Fails
         Fixes # 986: Send to fitting overwrites theory page even if blank
                      FitPage has focus
         Fixes # 990: utest_sasview.py giving different results than run_one.py
         Fixes # 993: Windows x64 versions not installing to correct folder
         Fixes # 994: Error changing fit engine
         Fixes # 995: OpenCL required on Linux even if turned off in GUI
         Fixes #1006: multiplicity models don't work with SQ
         Fixes #1007: spherical_sld model freezes SasView
         Fixes #1008: plugin model scaling not working? S
         Fixes #1010: Win64 build script not creating working executable
         Fixes #1011: sld_test failing on ubuntu
         Fixes #1013: FileReaderBaseClass output[] not reset - same file loaded
                      multiple times
         Fixes #1018: add Boltzmann distribution
         Fixes #1021: add PDF documentation to website and document in wiki
                      release process
         Fixes #1024: Update version numbers in master
         Fixes #1025: Sum/multiply editor hangs
         Fixes #1032: convert C++ modules to C
         Fixes #1035: Order of combining P(Q) and S(Q) in Plugins seems to matter
         Fixes #1037: data loader crop not working? & all fits crashing
         Fixes #1043: problem compiling marketplace models
         Fixes #1050: fix appveyor test for sasmodels win 64 python 3
         Fixes #1052: Can't use a user-created plugin model in a plugin model
         Fixes #1057: phi rotation issue for elliptical cylinder
         Fixes #1060: incorrect default for rectangle dispersion
         Fixes #1062: win32 build not installing correctly
         Fixes #1064: Fitting did not converge!!! error with a Sum|Multi plugin model
         Fixes #1069: GUI problem when using polydispersity/orientation distributions
         Fixes #1070: Parameter error boxes should not be editable
         Fixes #1079: Remove save button in report dialog on Mac
         Fixes #1081: GUI problem with new orientation distribution
         Fixes #1083: Magnetic models not being computed
         Fixes #1099: Erratic behaviour of Sum|Multi model in 4.1.2
         Fixes #1101: Batch results page not displaying polydispersity values
         Fixes #1131: OpencCl dialog does not open
         Fixes #1132: Slit Size Calculator Tool not working
         Fixes #1139: Missing Docs and Help for new Batch Slicing
         Fixes #1141: Intro to scripting.rst needs improvement
         Fixes #1142: Plugin framework is broken
         Fixes #1044: Unable to upload c file to marketplace
         Fixes #1145: Update models in model marketplace to 4.2 when 4.2 is released.
         Fixes #1148: Documentation for S(Q) models need updating
         Fixes #1128: AutoPlot generation for model documentation does not
                      include background

      It is recommended that all users upgrade to this version, but your
      attention is drawn to the Changes section above.


    - New in Version 4.2.0-Beta
      -------------------------
      This is a beta pre-release version of 4.2.0.  A number of fixes and changes
      have been made in the year since the previous release. Full release notes
      will be compiled prior to the full release 4.2.0.

      Highlights are:
        - Infrastucture for calculating 2D patterns from 3D orientated objects
          has now been totally refactored
        - Plugins have completely migrated to the new infrastructure now,
          including sum/multiply models
        - Some batch slicing options have been introduced
        - The known issue with the core_shell_parallelepiped is now fixed
        - Several data loading improvements
        - Several save Project improvements (though there are more to come)
        - Numerous bug fixes
        - Lots of documentation enhancement

      In the meantime please report any bugs or issues found while using this beta


    - New in Version 4.1.2
      --------------------
      This point release is a bug-fix release addressing:

       - Fixes #984: PDF Reports Generate Empty PDFs
       - Fixes a path typo
       - 64 bit and 32 bit Windows executables now available

      It is recommended that all users upgrade to this version


    - New in Version 4.1.1
      --------------------
      This point release is a bug-fix release addressing:

       - Fixes #948: Mathjax CDN is going away
       - Fixes #938: Cannot read canSAS1D file output by SasView
       - Fixes #960: Save project throws error if empty fit page
       - Fixes #929: Problem deleting data in first fit page
       - Fixes #918: Test folders not bundled with release
       - Fixes an issue with the live discovery of plugin models
       - Fixes an issue with the NXcanSAS data loader
       - Updated tutorials for SasView 4.x.y


    - New in Version 4.1.0
      ------------------
      This incremental release brings a series of new features and improvements,
      and a host of bug fixes. Of particular note are:

      - Correlation Function Analysis (Corfunc)
        This performs a correlation function analysis of one-dimensional SAXS/SANS data,
        or generates a model-independent volume fraction profile from the SANS from an
        adsorbed polymer/surfactant layer.

        A correlation function may be interpreted in terms of an imaginary rod moving
        through the structure of the material. G1(R) is the probability that a rod of
        length R moving through the material has equal electron/neutron scattering
        length density at either end. Hence a frequently occurring spacing within a
        structure manifests itself as a peak.

        A volume fraction profile \Phi(z) describes how the density of polymer
        segments/surfactant molecules varies with distance from an (assumed locally flat)
        interface.

      - Fitting of SESANS Data
        Data from Spin-Echo SANS measurements can now be loaded and fitted. The data will
        be plotted against the correct axes and models will automatically perform a Hankel
        transform in order to calculate SESANS from a SANS model.

      - Documentation
        The documentation has undergone significant checking and updating.

      - Improvements
        - Correlation function (corfunc) analysis of 1D SAS data added from CCP13
        - File converter tool for multi-file single column data sets
        - SESANS data loading and direct fitting using the Hankel transformation
        - Saving and loading of simultaneous and constrained fits now supported
        - Save states from SasView v3.x.y now loaded using sasmodel model names
        - Saving and loading of projects with 2D fits now supported
        - Loading a project removes all existing data, fits, and plots
        - Structure factor and form factor can be plotted independently
        - OpenCL is disabled by default and can be enabled through a fit menu
        - Data and theory fields are now independently expandable
      - Bug Fixes
        - Fixes #667: Models computed multiple times on parameters changes
        - Fixes #673: Custom models override built in models of same name
        - Fixes #678: Hard crash when running complex models on GPU
        - Fixes $774: Old style plugin models unloadable
        - Fixes #789: stacked disk scale doesn't match cylinder model
        - Fixes #792: core_shell_fractal uses wrong effective radius
        - Fixes #800: Plot range reset on plot redraws
        - Fixes #811 and #825: 2D smearing broken
        - Fixes #815: Integer model parameter handling
        - Fixes #824: Cannot apply sector averaging when no detector data present
        - Fixes #830: Cansas HDF5 reader fully compliant with NXCanSAS v1.0 format
        - Fixes #835: Fractal model breaks with negative Q values
        - Fixes #843: Multilayer vesicle does not define effective radius
        - Fixes #858: Hayter MSA S(Q) returns errors
        - Numerous grammatical and contexual errors in documention


    - New in Version 4.0.1
      ------------------
      This release fixes the critical bug #750 in P(Q)*S(Q).  Most damaging
      it appears that the background term was being added to S(Q) prior to
      multiplication by P(Q).


    - New in Version 4.0
      ------------------
      This release fixes the various bugs found during the alpha and beta testing
      - Improvements
        - Support for reading data files from Anton Paar Saxess instruments
        - Adds documentation on how to write custom models in the new framework
      - Bug Fixes
        - Fixes bug #604 Pringle model questions
        - Fixes bug #472 Reparameterize Teubner-Strey
        - Fixes bug #530 Numerical instabilities in Teubner Strey model
        - Fixes bug #658 ASCII reader very broken


    - New in Version 4.0 beta 1
      --------------------
      This beta adds support for the magnetic and multilevel models of 3.1.2
      and along with a host of bug fixes found in the alpha.

      - Model package changes and improvements
         - All 3.1.2 models now available in new interface
         - Old custom models should now still work
            - '''NOTE:''' These will be deprecated in a future version. Old
              custom models should be converted to the new model format which
              is now the same as the built in models and offers much better
              support.
         - Custom model editor now creates new style models
         - Custom model editor supports better error checking
      - Documentation improvements
        - Continued general cleanup
      - Other improvements/additions
         - Support for new canSAS 2D data files added
         - Plot axes range can now be set manually as well as by zooming
         - Plot annotations can now be moved around after being placed on plot.
         - The active optimizer is now listed on the top of the fit panel.
         - Linear fits now update qmin and max when the x scale limits are
           changed.  Also the plot range no longer resets after a fit.
      - Bug fixes
         - Fixes bug #511 Errors in linearized fits and clean up of interface
           including Kratky representation
         - Fixes bug #186 Data operation Tool now executes when something is
           entered in the text box and does not wait for the user to hit enter
         - Fixes bug #459 plot context menu bug
         - Fixes bug #559 copy to clipboard in graph menu broken
         - Fixes bug #466 cannot remove a linear fit from graph
         - Numerous bugs introduced in the alpha



    - New in Version 4.0.0-alpha
      --------------------
      This alpha release brings a major overhaul of the model system. The new model
      package allows rapid integration of custom models and access to polydispersity
      without requiring a compiler.

      - Model package changes and improvements
         - Model interface moved to independent sasmodels package.
         - Most models converted to new interface.
         - Allows rapid integration of user-written models.
         - OpenCL GPU utilization for faster fitting.
         - Improved numerical integration of Bessel functions.
      - SESANS integration and implementation
         - Scripting interface added for analysis of SESANS data.
         - Hankel transformation now accepts finite acceptance angles.
         - 2D cosine transformation added for TOF SESANS analysis.
      - Documentation improvements
         - The documentation tree was restructured for a better end user experience.
         - The documentation for each model was revamped and verified by at least
           two people following the conversion of the model.
         - Theoretical 1D (and 2D if applicable) scattering curves are auto-generated
           and added to the model documentation for each model.
      - Separation of GUI and calculations for future GUI enhancements
      - Bug fixes
         - Fixes bug #411 No stop button on simultaneous fit page
         - Fixes bug #410 Error with raspberry model
         - Fixes bug #364 Possible inconsistency in Poly_GausCoil model
         - Fixes bug #439 Hayter Penfold MSA code needs checking
         - Fixes bug #484 lammellerPC is precision limited
         - Fixes bug #498 $HOME/.matplotlib conflicts
         - Fixes bug #348 Control order in which fit parameters appear in the gui
         - Fixes bug #456 Provide DREAM Results Panel with something to identify
           data and age of results
         - Fixes bug #556 Build script improvements for developers



   - New in Version 3.1.2
     --------------------
     This release is a major stability improvement, having fixed a serious bug
     that came to light since release 3.1.1. All users should upgrade.

     - Fixes bug #468 broken remove constraint buttons in
       simultaneous/constrained fitting panel
     - Fixes bug #474 resulting from changes in 3.1.1 that had
       introduced an error in the high-Q of slit-smeared models.
     - Fixes bug #478 which would cause wx to run out of IDs and result
       in SasView crashing even if left alone.
     - Fixes bug #479 missing help button on simultaneous/constrained fit page
     - Fixes bug #480 GUI resizing issues on simultaneous fit page
     - Fixes bug #486 broken Report Results
     - Fixes bug #488 redraw issues in fit page



   - New in Version 3.1.1
     --------------------
     - Fixes bug #457 that prevented SasView from starting if the user was not
       connected to the internet, or was behind a proxy server.

   - New in Version 3.1.0
     --------------------
     - The documentation/help has had a complete overhaul including:
       - A completely new presentation interface (Sphinx).
       - Proof reading!
       - Updating for latest features.
       - A Help (or sometimes ?) button has been added to every panel, and some
         sub panels if appropriate, linking to the appropriate section in the
         documentation.
       - The model help has been split so that the Details button now brings up
         a very short pop-up giving the equation being used while HELP goes to
         the section in the full documentation describing the model.
       - Extensive help has also been added for the new optimizer engine (see
         below) including rules of thumb on how and when to choose a given
         optimizer and what the parameters do.
     - The optimizer engine has been completely replaced. The new optimizer
       still defaults to the standard Levenberg-Marquardt algorithm. However 4
       other optimizers are now also available. Each starts with a set of default
       parameters which can be tuned. The DREAM optimizer takes the longest but
       is the most powerful and yields rich information including full parameter
       correlation and uncertainty plots. A results panel has been added to
       accommodate this.
       - The five new optimizers are:
         - A Levenberg-Marquardt optimizer
         - A Quasi-Newton BFGS optimizer
         - A Nelder-Mead Simplex optimizer
         - A Differential Evolution optimizer
         - A Monte Carlo optimizer (DREAM)
     - New models were added:
         - MicelleSphCoreModel (currently residing in the Uncategorized category)
     - Existing models were updated:
         - LamellarPS (bug in polydispersity integration fixed)
         - RectangularPrismModel
         - RectangularHollowPrismModel
         - RectangularHollowPrismInfThinWallsModel
     - Infrastructure to allow SESANS data to be fit with models was added. This
       will become available in a future release but can currently be used from
       the command line with some caveats.
     - A number of bugs were fixed including a thread crashing issue and an
       incorrect slit smearing resolution calculation.
     - Implemented much more robust error logging to enable much easier
       debugging in general but particularly the debugging of issues reported by
       SasView users.
     - A number of infrastructure tasks under the hood to enhance maintainability
     - Upgrade from Wx 2.8 to Wx 3.0.2 which allows several new features but
       required significant additional rework as well.
     - Fully implemented Sphinx to the build process to produce both better
       user documentation and developer documentation.
     - Restructuring of the code base to more unified nomenclature and structure
       so that the source installation tree more closely matches the installer
       version tree.
     - Code cleanup (an ongoing task) .
     - Migration of the repository to github simplifying contributions from
       non-project personnel through pull requests.

   - New in Version 3.0.0
     --------------------
     - The GUI look and feel has been refactored to be more familiar for
       Windows users by using MDI frames. Graph windows are also now free-
       floating.
     - Five new models have been added: PringlesModel, CoreShellEllipsoidXTModel,
       RectangularPrismModel, RectangularHollowPrismModel and
       RectangularHollowPrismInfThinWallsModel.
     - The data loader now supports ILL DAT data files and reads the full meta
       information from canSAS file formats.
     - Redefined convention for specifying angular parameters for anisotropic
       models.
     - A number of minor features have been added such as permitting a log
       distribution of points when using a model to simulate data, and the
       addition of a Kratky plot option to the linear plots.
     - A number of bugs have also been fixed.
     - Save Project and Save Analysis now work more reliably.
     - BETA: Magnetic contrast supporting full polarization analysis has been
       implemented for some spherical and cylindrical models.
     - BETA: Two new tools have been added:
       - A generic scattering calculator which takes an atomic, magnetic or
         SLD distribution in space and generates the appropriate 2D
         scattering pattern. In some cases the orientationally averaged
         (powder) 1D scattering can also be computed. Supported formats
         include: SLD or text, PDB, and OMF magnetic moment distribution
         file.
       - An image viewer/converter for data in image format; this reads in
         an image file and will attempt to convert the image pixels to
         data. Supported formats include: TIFF, TIF, PNG, BMP, JPG.

   - New in Version 2.2.1
     --------------------
     - Minor patch to support CanSAS XML v1.1 file format
     - Added DataInfo for data in the DataExplorer and plots
     - Added Maximize/Restore button in the title bar of the graphs
     - Added a hide button in the toolbar of the graph panel
     - The 'x' button now deletes a graph
     - Edit SUM Model from the menubar can now generate and save more than one sum model
     - Reports can now be saved in pdf format on WIN and MAC
     - Made significant improvements to the batch/grid panel and fixed several bugs
     - Fixed a number of other minor bugs

   - New in Version 2.2.0
     --------------------
     - Application name changed to SasView
     - New fully customizable Category Manager added for better management of
       increasing number of models
     - Improved the Grid Window functionality in the batch fitting mode
     - Added a simpler Graph/Plot modification interface
     - Added a new 'Data Operation' tool for addition, subtraction, multiplication,
       division, of two data sets.
     - The 'Sum Model' editor was extended and renamed 'Summation and Multiplication'
       editor
     - Added more plot symbols options for 1d plots
     - Added improved trapping of compiling errors to the 'New model editor'
     - Added some intelligent outputs (e.g., Rg, background, or rod diameter
       depending on the choice of axis scale of the plot) to the linear fits
     - Added more models

   - Feature set from previous versions
     -----------------------------------
     - Perspectives Available
       - Invariant calculator: Calculates the invariant, volume fraction, and
         specific surface area.
       - P(r) inversion calculator: Indirect Fourier transformation method.
       - Fitting: the tool used for modeling and fitting 1D and 2D data to
         analytical model functions
       - Tools: provides a number of useful supplementary tools such as SLD
         calculation

     - Fitting
       - Includes a large number of model functions, both form factors and structure factors.
       - Support P(Q)*S(Q) for form factors that flag they can be so multiplied.
       - Supports Gaussian, lognormal, Shulz, rectangular and custom distribution
         functions for models that need to include polydispersity or for orientational
         distributions if appropriate.
       - Anisotropic shapes and magnetic moment modeling in 2D allow for a non-uniform
         distribution of orientations of a given axis leading to modeling and fitting
         capabilities of non azimuthaly symmetric data.
       - User can choose to weight fits or not. If using weights, the user can choose
         the error bar on each point if provided in the file, the square root
         of the intensity or the intensity itself.
       - Instrumental resolution smearing of model or fits is provided with several
         options: read the resolution/point fromt he file. Input a pinhole resolution
         or a slit resolution.
       - Users can define the Qrange (Qmin and Qmax) for both 1D and 2D data for
         fitting and modeling, but not graphically.  The range can be reset to the
         defaults (limits of q in data set for a fit) with the reset button.
       - A mask can be applied to 2D calculation and fitting.
       - Normalized residual plots are provided with every fit.
       - Model function help available through detail button or from the fitting panel.
       - Simultaneous/(advanced)constrained fitting allows for fitting a single
         data set or several different sets simultaneously with the application
         of advanced constraints relating fit parameters to functions of other
         parameters (including from a different set). For example thickness of
         shell = sin(30) times the length.
       - Models that are the sum of two other models can be easily generated through the
         SUM Model menubar item.
       - New Python models can be added on the fly by creating an appropriate Python
         file in the model plugin directory. Two tools are provided to help:
         An easy to use custom model editor allows the quick generation of new Python
         models by supplying only the parameters and their default value (box 1)
         and the mathematical function of the model (box 2) and generating the
         necessary *.py file.  A separate advanced model editor provides a full Python
         file editor.  Either way once saved the model becomes immediately available
         to the application.
       - A batch fitting capability allows for the analysis of a series of data sets to
         a single model and provides the results in a tabular form suitable for saving
         or plotting the evolution of the fit parameters with error bars (from within
         the application).

     - Tools
       - A scattering length density calculator,including some X-ray information
         is provided.
       - A density to vol. fraction converter is provided
       - In application access to a Python shell/editor (PyCrust) is provided
       - An instrument resolution calculator, including possible gravitational and
         TOF effects is provided
       - A slit size calculator optimized for Anton Paar Saxess is provided.
       - A kiessig fringe thickness calculator is provided

     - Plots and plot management
       - A 3D graphing option (for 2d data/results) is provided with the view
         controlled by the mouse
       - 2D plots are shown with an intensity color bar. 2D Color map can be user
         adjusted.
       - Supports output of plot to a variety of graphic formats. Supported formats
         include: png, eps, emf, jpg/jpeg, pdf, ps, tif/tiff, rawRGBbitmap(raw, rgba),
         and scalable vector graphic (svg/svgz)
       - Supports ouput of data in plot (1 or 2D) to limited data formats
       - Multiple data sets can be loaded into a single graph for viewing (but a fit
         plot can currently only have a single plot).
       - Extensive context sensitive plot/fitting/manipulation options are available
         through a right mouse click pop-up menu on plots.

     - Data management
       - Supports 2 + column 1D ASCII data, NIST 1D and 2D data, and canSAS data
         via plug-in mechanism which can easily allow other readers as appropriate.
       - 2D data is expected in Q space but for historical reasons accepts the
         NIST 2D raw pixel format and will do conversion internally.
       - The full data and metadata available to SasView is viewable in ASCII via
         right clicking on a data set and choosing Data Info in the DataExplorer
         or on the plots
       - Supports loading a single file, multiple files, or a whole folder
       - An optional Data Explorer is provided (default) which simplifies managing,
         plotting, deleting, or setup for computation. Most functions however do
         not require access to the explorer/manager and can be accessed through
         right click menus and the toolbar.  The data explorer can be re-started
         from the menu bar.

     - Data manipulation
       - Support various 2D averaging methods : Circular, sectors, annular,
         boxsum, boxQx and boxQy.
       - A 2D data maks editor is provided
       - 2D mask can be applied to the circular averaging.

     - Miscellaneous features
       - limited reports can be generated in pdf format
       - Provides multiprocessor support(Windows only)
       - Limited startup customization currently includes default startup
         data folder and choice of default starting with data manager
       - Limited support for saving(opening) a SasView project or a SasView analysis
         (subproject) is provided.
       - SasView can be launched and loaded with a file of interesty by double-clicking
         on that file (recognized extension)
       - A data file or data folder can be passed to SasView when launched from
         the command line.
       - Limited bookmarking capability to later recall the results of a fit calculation
         is provided.
       - Extensive help is provided through context sensitive mouse roll-over,
         information bar (at the bottom of the panel), the console menu, and
         access to the help files in several different ways.


2- Downloading and Installing
=============================

   *** Note 1:  If you have a SasView installer (.EXE or .MSI), you do not need to 
                worry about any of the following.  However, it is highly recommended 
                that any previous versions of SasView are uninstalled prior to 
                installing the new version UNLESS you are installing SasView to 
                versioned folders.

   *** Note 2:  The easiest approach to setting up the proper environment to
                build from source is to use Conda.  Instructions for setting up
                and using Conda can be found at:
                  http://trac.sasview.org/wiki/DevNotes/CondaDevSetup
                    
   *** Note 3:  Much more information is available at www.sasview.org under 
                links/downloads. In particular, look in the 'For Developers' section. 
                Also have a look at http://trac.sasview.org/.

   2.1- System Requirements
        - Python version >= 2.5 and < 3.0 should be running on the system
        - We currently use Python 2.7

   2.2- Package Dependencies
        - Ensure the required dependencies are installed
          - For the latest list of dependencies see the appropriate yml file in
            the SasView repo at sasview/build_tools/conda/ymls

   2.3- Installing from Source
        - Get the source code
          - create a folder to contain the source code; if working with
            multiple versions you might want to use versioned folder names
            like 'sasview-x.x.x'
          - open a command line window in the source code folder
          - to get the CURRENT DEVELOPMENT VERSION from source control use
              git clone https://github.com/SasView/sasview.git sasview
              git clone https://github.com/Sasview/sasmodels.git sasmodels
              git clone https://github.com/bumps/bumps.git bumps
          - to get a SPECIFIC RELEASE VERSION from source control go to
              https://github.com/SasView/sasview/releases
            and download the required zip or tar.gz file. Unzip/untar it
            to the source code folder.

   2.4- Building and Installing         
        - use 'python setup.py build'
        - use 'python setup.py install'
        To build the documentation
          - use'python setup.py docs'

   2.5- Running SasView
          - use 'python run.py'; this runs from the source directories, so you
            don't have to rebuild every time you make a change, unless you are
            changing the C model files.
          - if using Conda the above command will also build SasView, but you 
            must issue 'activate sasview' first.


3- Known Issues
===============

   4.2.0 - All systems
      There are currently no major known issues. A full list of known bugs and
      feature requests by release version that users may wish to be aware of
      can be viewed at http://trac.sasview.org/report/3
      NOTE: Any corrections to models that may become known/available will be
      posted to Marketplace as available (and fixed in the following release)

   4.1- All systems:
      The conversion to sasmodels infrastructure is ongoing and should be
      completed in the next release. In the meantime this leads to a few known
      issues:
        - The way that orientation is defined is being refactored to address
          long standing issues and comments.  In release 4.1 however only models
          with symmetry (e.g. a=b) have been converted to the new definitions.
          The rest (a <> b <> c - e.g. parellelepiped) maintain the same
          definition as before and will be converted in 4.2.  Note that
          orientational distribution also makes much more sense in the new
          framework.  The documentation should indicate which definition is being
          used for a given model.
        - The infrastructure currently handles internal conversion of old style
          models so that user created models in previous versions should continue
          to work for now. At some point in the future such support will go away.
          Everyone is encouraged to convert to the new structure which should be
          relatively straight forward and provides a number of benefits.
        - In that vein, the distributed models and those generated by the new
          plugin model editor are in the new format, however those generated by
          sum|multiply models are the old style sum|multiply models. This should
          also disappear in the near future
        - The on the fly discovery of plugin models and changes thereto behave
          inconsistently.  If a change to a plugin model does not seem to
          register, the Load Plugin Models (under fitting -> Plugin Model
          Operations) can be used.  However, after calling Load Plugin Models, the
          active plugin will no longer be loaded (even though the GUI looks like
          it is) unless it is a sum|multiply model which works properly.  All
          others will need to be recalled from the model dropdown menu to reload
          the model into the calculation engine.  While it might be annoying it
          does not appear to prevent SasView from working..
        - The model code and documentation review is ongoing. At this time the
          core shell parellelepiped is known to have the C shell effectively fixed
          at 0 (noted in documentation) while the triaxial ellipsoid does not seem
          to reproduce the limit of the oblate or prolate ellipsoid. If errors are
          found and corrected, corrected versions will be uploaded to the
          marketplace.

   3.1- All systems:
        - The documentation window may take a few seconds to load the first time
          it is called. Also, an internet connection is required before
          equations will render properly. Until then they will show in their
          original TeX format.
        - If the documentation window remains stubbornly blank, try installing a
          different browser and set that as your default browser. Issues have
          been noted with Internet Explorer 11.
        - Check for Updates may fail (with the status bar message ' Cannot
          connect to the application server') if your internet connection uses
          a proxy server. Tested resolutions for this are described on the
          website FAQ.
        - The copy and paste functions (^C, ^V) in the batch mode results grid
          require two clicks: one to select the cell and a second to select the
          contents of the cell.
        - The tutorial has not yet been updated and is somewhat out of date
        - Very old computers may struggle to run the 3.x and later releases
        - Polydispersity on multiple parameters included in a simultaneous/
          constrained fit will likely not be correct
        - Constrained/simultaneous fit page does not have a stop button
        - Constrained/simultaneous fit do not accept min/max limits
        - Save project does not store the state of all the windows
        - Loading projects can be very slow
        - Save Project only works once a data set has been associated with
          a model.  Error is reported on status bar.
        - There is a numerical precision problem with the multishell model when
          the iner radius gets large enough (ticket #288)
        - The angular distribution angles are not clearly defined and may in
          some cases lead to incorrect calculations(ticket #332)

   3.2- Windows:
        - If installed to same directory as old version without first removing
          the old version, the old desktop icon will remain but point to the
          new exe version. Likewise all the start menu folders and items will
          have the old name even though pointing to the new version.  Usually
          safest to uninstall old version prior to installing new version anyway.

   3.3- MAC:
        - Application normally starts up hidden. Click icon in Dock to view/use
          application.
        - Multiprocessing does not currently work on MAC OS

   3.4- Linux:
        - Not well tested


4- SasView website
==================

   - www.sasview.org.  This main project site is the gateway to all
     information about the sasview project.  It includes information
     about the project, a FAQ page and links to all developer and user
     information, tools and resources.


5- Frequently Asked Questions
=============================

   - www.sasview.org/faq.html


6- Installer download website
=============================

   - Latest release Version
     - https://github.com/SasView/sasview/releases
   - Latest developer builds
     - https://jenkins.esss.dk/sasview/view/Master-Builds/