Changes in / [f1d9da7:bac81f4] in sasview


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13 edited

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  • docs/sphinx-docs/source/user/menu_bar.rst

    rd1fa2b8 r959eb01  
    1111Data can be loaded one file at a time, or by selecting multiple files, or by loading an entire folder of  
    1212files (in which case *SasView* will attempt to make an intelligent guess as to what to load based on the  
    13 file formats it recognises in the folder!). Data can also be loaded by dragging and dropping files directly 
    14 onto Data Explorer. 
     13file formats it recognises in the folder!). 
    1514 
    1615A *SasView* session can also be saved and reloaded as an 'Analysis' (an individual model fit or invariant  
    … …  
    3231 
    3332- show the Batch Fitting Results Panel if it has been closed; 
     33- show/hide the Data Explorer Panel; 
    3434- show/hide the Toolbar of icons below the Menu Bar; 
    3535- select the default location that *SasView* looks in for data to analyse (the *SasView* installation directory, the initial default, or a custom folder). NB: any change only takes effect when *SasView* is restarted; 
    … …  
    6060 
    6161- create a new FitPage; 
    62 - setting up a Constrained or Simultaneous Fit; 
    6362- change optimiser (under Fit Options); 
    6463- view fit parameter correlations, distributions, and convergence traces (under Fit Results); 
    65 - create a Plugin Model. 
    66 - edit a Plugin Model. 
    67 - manage Plugin Models 
    68 - create a Sum/Multiple Plugin Model 
    69   
     64- create/edit a Plugin Model. 
     65 
     66Additional functionality is available under this menu option during particular types of model fitting, including: 
     67 
     68- setting up a Constrained or Simultaneous Fit; 
     69- combining a Batch Fit (an obscure capability); 
     70- setting up Chain Fitting. 
    7071 
    7172Help 

  • src/sas/qtgui/MainWindow/UI/DataExplorerUI.ui

    rd1fa2b8 rc6fb57c  
    8787          <widget class="QPushButton" name="cmdDeleteData"> 
    8888           <property name="text"> 
    89             <string>Delete Data</string> 
     89            <string>Delete</string> 
    9090           </property> 
    9191          </widget> 

  • src/sas/qtgui/MainWindow/media/data_explorer_help.rst

    rd1fa2b8 r417c03f  
    1616the context menu of plot panels or other menus within the application. 
    1717 
     18Under *View* in the menu bar, *Data Explorer* can be toggled between Show and  
     19Hide by clicking *Show/Hide Data Explorer*. 
     20 
     21*NOTE! When* Data Explorer *is hidden, all data loaded will be sent directly  
     22to the current active analysis, if possible. When* Data Explorer *is 
     23shown, data go first to the* Data Explorer. 
     24 
    1825.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    1926 
    … …  
    2835specified folder; 
    2936 
    30 Drag and drop a file or multiple files from the external file explorer into 
    31 the Data Explorer area. 
    32  
    3337Or, in the *Data Explorer* click the button *Load Data*, then select one or more 
    3438(by holding down the Ctrl key) files to load into SasView. 
    3539 
    3640The name of each loaded file will be listed in the *Data Explorer*. Clicking the 
    37 empty triangle symbol alongside will display any available metadata read from the file. 
     41*+* symbol alongside will display any available metadata read from the file. 
    3842 
    3943.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    … …  
    4448Right-clicking on a loaded dataset (or model calculation, what SasView calls a  
    4549'theory') brings up a *Handy Menu* from which it is possible to access *Data Info*, 
    46 *Save* the data/theory, *Delete* the data/theory or *Plot* the data/theory. 
     50*Save* the data/theory, or *Plot* the data/theory. 
    4751 
    4852.. image:: hand_menu.png 
    … …  
    5458 
    5559To interact with data it must be activated. This is accomplished by checking  
    56 the box next to the file name in the *Data Explorer*. A tick will appear. 
     60the box next to the file name in the *Data Explorer*. A green tick will appear. 
    5761 
    5862Unchecking/unticking a box deactivates that data set. 
    … …  
    6973selected data sets.* 
    7074 
    71 *Delete Data* removes all references to selected data from SasView. 
    72  
    73 Right-clicking on one or more datasets also gives the option of removing  
    74 the selected datasets. 
     75*Remove Data* removes all references to selected data from SasView. 
    7576 
    7677.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    … …  
    7980------------------- 
    8081 
    81 Click on the *Create New* button in the *Plot* section to create a new plot 
    82 panel where the currently selected data will be plotted. 
     82Click on the *New Plot* button to create a new plot panel where the currently 
     83selected data will be plotted. 
    8384 
    8485.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    … …  
    104105------------------- 
    105106 
    106 The *Freeze Theory* button on the *Theory* tab page generates data from the selected theory. 
     107The *Freeze Theory* button generates data from the selected theory. 
    107108 
    108109*NOTE! This operation can only be performed when theory labels are selected in* 
    … …  
    114115---------------------------- 
    115116 
    116 Click on the *Send data TO* button to send the currently selected data to the currently 
    117 active analysis (*Fitting*, *P(r) Inversion*, or *Invariant* calculation). 
     117Click on the *Send To* button to send the currently selected data to one of the 
     118available types of analysis (*Fitting*, *P(r) Inversion*, or *Invariant* calculation). 
    118119  
    119 The *Single*/*Batch* mode radio buttons only apply to *Fitting* and *P(r) Inversion*. 
     120The *Single*/*Batch* mode radio buttons only apply to *Fitting*. 
    120121 
    121122*Batch mode* provides serial (batch) fitting with one model function, that is,  
    … …  
    126127.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    127128 
    128 .. note::  This help document was last changed by Piotr Rozyczko, 11May2018 
     129.. note::  This help document was last changed by Steve King, 01May2015 

  • src/sas/qtgui/Perspectives/Fitting/media/fitting_help.rst

    rb31b7e2 r417c03f  
    5252 
    5353Use the *Category* drop-down menu to chose a category of model, then select 
    54 a model from the drop-down menu to the right. The "Show Plot" button on the 
    55 bottom of the dialog will become active. If you click on it,  
    56 a graph of the chosen model, calculated using default parameter values, will appear. 
    57 The graph will update dynamically as the parameter values are changed. 
     54a model from the drop-down menu beneath. A graph of the chosen model, calculated 
     55using default parameter values, will appear. The graph will update dynamically 
     56as the parameter values are changed. 
    5857 
    5958You can decide your own model categorizations using the :ref:`Category_Manager`. 
    6059 
    61 Once you have selected a model you can read its help documentation by right clicking 
    62 on the empty space in the parameter table. 
    63  
    64 .. image:: descr_fig.png 
     60Once you have selected a model you can read its help documentation by clicking 
     61on the *Description* button to the right. 
    6562 
    6663Show 1D/2D 
    … …  
    7269*NB: Magnetic scattering can only be fitted in SasView in 2D.* 
    7370 
    74 To activate 2D fitting mode, select the *2D view* checkbox on the *Fit Page*. To 
    75 return to 1D fitting model, de-select the same checkbox. 
     71To activate 2D fitting mode, click the *Show 2D* button on the *Fit Page*. To 
     72return to 1D fitting model, click the same button (which will now say *Show 1D*). 
    7673 
    7774.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    … …  
    139136*  By copying/editing an existing model (this can include models generated by 
    140137   the New Plugin Model* dialog) in the :ref:`Python_shell` or 
    141    :ref:`Plugin_Editor` (suitable for all use cases) 
     138   :ref:`Advanced_Plugin_Editor` (suitable for all use cases) 
    142139*  By writing a model from scratch outside of SasView (only recommended for code 
    143140   monkeys!) 
    … …  
    154151----------------------- 
    155152 
    156 From the *Fitting* option in the menu bar, select one of the options: 
     153From the *Fitting* option in the menu bar, select *Plugin Model Operations* 
    157154 
    158155.. image:: edit_model_menu.png 
    159156 
    160 *  *Add Custom Model* - to create a plugin model template with a helper dialog 
    161 *  *Edit Custom Model* - to edit a plugin model in an editor window 
    162 *  *Manage Custom Models* - to open a custom model manager allowing for a number of actions to be taken on custom models: listing, adding, deleteing, duplicating, editing 
    163 *  *Add/Multiply Models* - to create a plugin model by summing/multiplying *existing models* in the model library 
     157and then one of the sub-options 
     158 
     159*  *New Plugin Model* - to create a plugin model template with a helper dialog 
     160*  *Sum|Multi(p1,p2)* - to create a plugin model by summing/multiplying *existing models* in the model library 
     161*  *Advanced Plugin Editor* - to create/edit a plugin model in a Python shell 
     162*  *Delete Plugin Models* - to delete a plugin model 
     163*  *Load Plugin Models* - to (re-)load plugin models 
    164164 
    165165.. _New_Plugin_Model: 
    166166 
    167 Add Custom Model 
     167New Plugin Model 
    168168^^^^^^^^^^^^^^^^ 
    169169 
    170170Relatively straightforward models can be programmed directly from the SasView 
    171 GUI using the *Plugin Definition* Function. 
     171GUI using the *New Plugin Model Function*. 
    172172 
    173173.. image:: new_model.png 
    … …  
    185185 
    186186A model file generated by this option can be viewed and further modified using 
    187 the :ref:`Model_Editor`. 
     187the :ref:`Advanced_Plugin_Editor` . 
    188188 
    189189**SasView version 4.2** made it possible to specify whether a plugin created with 
    … …  
    217217a P(Q) model has been selected). 
    218218 
    219  
    220 .. Model_Editor: 
    221  
    222 Model Editor 
    223 ^^^^^^^^^^^^ 
    224  
    225 Selecting "Edit Custom Model" option opens the editor window. 
    226  
    227 .. image :: model_editor_empty.png 
    228  
    229 Initially, the editor is empty. A custom model can be loaded by clicking on the *Load plugin...* button and choosing one of the existing custom plugins. 
    230  
    231 Once the model is loaded, it can be edited and saved with *Save* button. 
    232 Saving the model will perform the validation and only when the model is correct it will be saved to a file. 
    233 Successful model check is indicated by a SasView status bar message. 
    234  
    235 When *Cancel* is clicked, any changes to the model are discarded and the window is closed. 
    236  
    237  
    238 For details of the SasView plugin model format see :ref:`Writing_a_Plugin` . 
    239  
    240 To use the model, go to the relevant *Fit Page*, select the *Plugin Models* 
    241 category and then select the model from the drop-down menu. 
    242  
    243  
    244 .. Plugin_Manager: 
    245  
    246 Plugin Manager 
    247 ^^^^^^^^^^^^^^ 
    248  
    249 Selecting the *Manage Custom Models* option shows a list of all the plugin models in the plugin model folder, on Windows this is 
    250  
    251   *C:\\Users\\{username}\\.sasview\\plugin_models* 
    252  
    253 You can add, edit, duplicate and delete these models using buttons on the right side of the list. 
    254  
    255 .. image:: plugin_manager.png 
    256  
    257  
    258 Add a model 
    259 ^^^^^^^^^^^ 
    260  
    261 Clicking the "Add" button opens the Model Editor window, allowing you to create a new plugin as described above. 
    262  
    263 Duplicate a model 
    264 ^^^^^^^^^^^^^^^^^ 
    265  
    266 Clicking the "Duplicate" button will create a copy of the selected model(s). Naming of the duplicate follows the standard, with added * (n)* to the plugin model name, with *n* being the first unused yet integer. 
    267  
    268 Edit a model 
    269 ^^^^^^^^^^^^ 
    270  
    271 When a single model is selected, clicking this button will open the Advanced *Model Editor* allowing you to edit the 
    272 Python code of the model. 
    273 If no models or multiple models are selected, the *Edit* button is disabled. 
    274  
    275 Delete Plugin Models 
    276 ^^^^^^^^^^^^^^^^^^^^ 
    277  
    278 Simply highlight the plugin model(s) to be removed and click on the "Delete" button. The operation is final. 
    279  
    280 *NB: Models shipped with SasView cannot be removed in this way.* 
    281  
    282  
    283 Add/Multiply Models 
    284 ^^^^^^^^^^^^^^^^^^^ 
     219Sum|Multi(p1,p2) 
     220^^^^^^^^^^^^^^^^ 
    285221 
    286222.. image:: sum_model.png 
    … …  
    294230     Plugin Model = scale_factor * (model1 * model2) + background 
    295231 
    296 In the *Add/Multiply Models* give the new model a function name and brief 
     232In the *Easy Sum/Multi Editor* give the new model a function name and brief 
    297233description (to appear under the *Details* button on the *FitPage*). Then select 
    298 two existing models, as model_1 and model_2, and the required operator, '+' or '*' between 
     234two existing models, as p1 and p2, and the required operator, '+' or '*' between 
    299235them. Finally, click the *Apply* button to generate and test the model and then click *Close*. 
    300236 
     237Any changes to a plugin model generated in this way only become effective *after* it is re-selected 
     238from the plugin models drop-down menu on the FitPage. If the model is not listed you can force a 
     239recompilation of the plugins by selecting *Fitting* > *Plugin Model Operations* > *Load Plugin Models*. 
    301240 
    302241**SasView version 4.2** introduced a much simplified and more extensible structure for plugin models 
    303 generated through the Add/Multiply Models editor. For example, the code for a combination of a sphere model 
     242generated through the Easy Sum/Multi Editor. For example, the code for a combination of a sphere model 
    304243with a power law model now looks like this:: 
    305244 
    … …  
    336275that was not possible in earlier versions of SasView. 
    337276 
    338  
     277.. _Advanced_Plugin_Editor: 
     278 
     279Advanced Plugin Editor 
     280^^^^^^^^^^^^^^^^^^^^^^ 
     281 
     282Selecting this option shows all the plugin models in the plugin model folder, on Windows this is 
     283 
     284  *C:\\Users\\{username}\\.sasview\\plugin_models* 
     285 
     286You can edit, modify, and save the Python code in any of these models using the 
     287*Advanced Plugin Model Editor*. Note that this is actually the same tool as the :ref:`Python_shell` . 
     288 
     289For details of the SasView plugin model format see :ref:`Writing_a_Plugin` . 
     290 
     291.. note:: Model files generated with the Sum/Multi option are still using the SasView 3.x model format. Unless you are confident about what you are doing, it is recommended that you only modify lines denoted with the ## <----- comments! 
     292 
     293When editing is complete, select *Run* > *Check Model* from the *Advanced Plugin Model Editor* menu bar. An *Info* box will appear with the results of the compilation and model unit tests. The model will only be usable if the tests 'pass'. 
     294 
     295.. image:: ../calculator/new_pycrust_example_2.png 
     296 
     297To use the model, go to the relevant *Fit Page*, select the *Plugin Models* 
     298category and then select the model from the drop-down menu. 
     299 
     300Any changes to a plugin model generated in this way only become effective *after* it is re-selected from the model drop-down menu on the FitPage. 
     301 
     302Delete Plugin Models 
     303^^^^^^^^^^^^^^^^^^^^ 
     304 
     305Simply highlight the plugin model to be removed. The operation is final!!! 
     306 
     307*NB: Models shipped with SasView cannot be removed in this way.* 
     308 
     309Load Plugin Models 
     310^^^^^^^^^^^^^^^^^^ 
     311 
     312This option loads (or re-loads) all models present in the 
     313*~\\.sasview\\plugin_models* folder. 
    339314 
    340315.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    … …  
    342317.. _Fitting_Options: 
    343318 
    344 Fit Algorithms 
     319Fitting Options 
    345320--------------- 
    346321 
    … …  
    348323to modify some of the configurational parameters for each optimiser. 
    349324 
    350 From *Fitting* in the menu bar select *Fit Algorithms*, then select one of the following 
     325From *Fitting* in the menu bar select *Fit Options*, then select one of the following 
    351326optimisers: 
    352327 
    … …  
    357332*  Nelder-Mead Simplex 
    358333 
    359 .. image:: fit_algorithms.png 
    360  
    361334The DREAM optimiser is the most sophisticated, but may not necessarily be the best 
    362335option for fitting simple models. If uncertain, try the Levenberg-Marquardt optimiser 
    … …  
    375348sub-region of the data for fitting. 
    376349 
    377 In a *FitPage* or *BatchPage* change the tab to *Fit Options* and then change  
    378 the *Q* values in the *Min* and/or *Max* 
    379 text boxes.  
    380  
    381 .. 
    382   Vertical coloured bars will appear on the graph with the data and 
    383   'theory' indicating the current *Q* limits (red = *Qmin*, purple = *Qmax*). 
     350In a *FitPage* or *BatchPage* change the *Q* values in the *Min* and/or *Max* 
     351text boxes. Vertical coloured bars will appear on the graph with the data and 
     352'theory' indicating the current *Q* limits (red = *Qmin*, purple = *Qmax*). 
    384353 
    385354To return to including all data in the fit, click the *Reset* button. 
    … …  
    387356.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    388357 
    389 .. 
    390  
    391   Shortcuts 
    392   --------- 
    393  
    394   Copy/Paste Parameters 
    395   ^^^^^^^^^^^^^^^^^^^^^ 
    396  
    397   It is possible to copy the parameters from one *Fit Page* and to paste them into 
    398   another *Fit Page* using the same model. 
    399  
    400   To *copy* parameters, either: 
    401  
    402   *  Select *Edit -> Copy Params* from the menu bar, or 
    403   *  Use Ctrl(Cmd on Mac) + Left Mouse Click on the *Fit Page*. 
    404  
    405   To *paste* parameters, either: 
    406  
    407   *  Select *Edit -> Paste Params* from the menu bar, or 
    408   *  Use Ctrl(Cmd on Mac) + Shift + Left-click on the *Fit Page*. 
    409  
    410   If either operation is successful a message will appear in the info line at the 
    411   bottom of the SasView window. 
    412  
    413   Bookmark 
    414   ^^^^^^^^ 
    415  
    416   To *Bookmark* a *Fit Page* either: 
    417  
    418   *  Select a *Fit Page* and then click on *Bookmark* in the tool bar, or 
    419   *  Right-click and select the *Bookmark* in the popup menu. 
     358 
     359Shortcuts 
     360--------- 
     361 
     362Copy/Paste Parameters 
     363^^^^^^^^^^^^^^^^^^^^^ 
     364 
     365It is possible to copy the parameters from one *Fit Page* and to paste them into 
     366another *Fit Page* using the same model. 
     367 
     368To *copy* parameters, either: 
     369 
     370*  Select *Edit -> Copy Params* from the menu bar, or 
     371*  Use Ctrl(Cmd on Mac) + Left Mouse Click on the *Fit Page*. 
     372 
     373To *paste* parameters, either: 
     374 
     375*  Select *Edit -> Paste Params* from the menu bar, or 
     376*  Use Ctrl(Cmd on Mac) + Shift + Left-click on the *Fit Page*. 
     377 
     378If either operation is successful a message will appear in the info line at the 
     379bottom of the SasView window. 
     380 
     381Bookmark 
     382^^^^^^^^ 
     383 
     384To *Bookmark* a *Fit Page* either: 
     385 
     386*  Select a *Fit Page* and then click on *Bookmark* in the tool bar, or 
     387*  Right-click and select the *Bookmark* in the popup menu. 
    420388 
    421389.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    … …  
    423391.. _Status_bar: 
    424392 
    425 Status Bar & Log Explorer 
    426 ------------------------- 
     393Status Bar & Console 
     394-------------------- 
    427395 
    428396The status bar is located at the bottom of the SasView window and displays 
    429 messages, warnings and errors. 
    430  
    431 .. image:: log_explorer.png 
    432  
    433 The bottom part of the SasView application window contains the *Log Explorer*. 
    434 The *Log Explorer* displays available message history and run-time traceback information. 
     397messages, hints, warnings and errors. 
     398 
     399At the right-hand side of the status bar is a button marked *Console*. The *Console* 
     400displays available message history and some run-time traceback information. 
     401 
     402During a long task the *Console* can also be used to monitor the progress. 
    435403 
    436404.. ZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZZ 
    … …  
    441409--------------- 
    442410 
    443 *NB: Before proceeding, ensure that the Batch mode checkbox at the bottom of* 
    444 *the Data Explorer is unchecked (see the section* :ref:`Loading_data` *).* 
     411*NB: Before proceeding, ensure that the Single Mode radio button at the bottom of* 
     412*the Data Explorer is checked (see the section* :ref:`Loading_data` *).* 
    445413 
    446414This mode fits one data set. 
    447415 
    448 .. When data is sent to the fitting it is plotted in a graph window as markers. 
    449 When data is sent to the fitting, the Fit Page will show the dataset name. 
    450  
    451 .. image:: dataset_name.png 
    452  
    453 Clicking on the *Show Plot* will cause the data can be plotted in a graph window as markers. 
     416When data is sent to the fitting it is plotted in a graph window as markers. 
    454417 
    455418If a graph does not appear, or a graph window appears but is empty, then the data 
    … …  
    457420or in the *Console* window. 
    458421 
    459 Assuming the data has loaded correctly, when a model is selected a blue model 
     422Assuming the data has loaded correctly, when a model is selected a green model 
    460423calculation (or what SasView calls a 'Theory') line will appear in the earlier graph 
    461424window, and a second graph window will appear displaying the residuals (the 
    … …  
    477440*'correlated').* 
    478441 
    479 In the bottom right corner of the *Fit Page* is a box displaying the normalised value 
     442In the bottom left corner of the *Fit Page* is a box displaying the normalised value 
    480443of the statistical $\chi^2$ parameter returned by the optimiser. 
    481444 

  • src/sas/qtgui/Plotting/PlotterBase.py

    re30646ab r42787fb  
    3838        # Define canvas for the figure to be placed on 
    3939        self.canvas = FigureCanvas(self.figure) 
     40 
     41        # ... and the toolbar with all the default MPL buttons 
     42        self.toolbar = NavigationToolbar(self.canvas, self) 
    4043 
    4144        # Simple window for data display 
    … …  
    109112        if not quickplot: 
    110113            # Add the toolbar 
    111             self.toolbar = NavigationToolbar(self.canvas, self) 
    112114            layout.addWidget(self.toolbar) 
    113115            # Notify PlotHelper about the new plot 
    … …  
    295297        Use the internal MPL method for saving to file 
    296298        """ 
    297         if not hasattr(self, "toolbar"): 
    298             self.toolbar = NavigationToolbar(self.canvas, self) 
    299299        self.toolbar.save_figure() 
    300300 

  • src/sas/qtgui/Utilities/TabbedModelEditor.py

    rf9214aa raed0532  
    241241        # Run the model test in sasmodels 
    242242        try: 
    243             model_results = GuiUtils.checkModel(full_path) 
     243            model_results = self.checkModel(full_path) 
    244244            logging.info(model_results) 
    245245        except Exception as ex: 

  • src/sas/sascalc/fit/AbstractFitEngine.py

    racd9c311 r63319b0  
    300300            self.qmax = math.sqrt(x_max * x_max + y_max * y_max) 
    301301        ## new error image for fitting purpose 
    302         if self.err_data is None or self.err_data == []: 
     302        if self.err_data is None or not self.err_data: 
    303303            self.res_err_data = np.ones(len(self.data)) 
    304304        else: 
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