Changeset 23a9beb in sasview for src/sas/invariant/media/pr_help.rst


Ignore:
Timestamp:
Feb 15, 2015 10:09:34 AM (10 years ago)
Author:
smk78
Branches:
master, ESS_GUI, ESS_GUI_Docs, ESS_GUI_batch_fitting, ESS_GUI_bumps_abstraction, ESS_GUI_iss1116, ESS_GUI_iss879, ESS_GUI_iss959, ESS_GUI_opencl, ESS_GUI_ordering, ESS_GUI_sync_sascalc, costrafo411, magnetic_scatt, release-4.1.1, release-4.1.2, release-4.2.2, release_4.0.1, ticket-1009, ticket-1094-headless, ticket-1242-2d-resolution, ticket-1243, ticket-1249, ticket885, unittest-saveload
Children:
920928f
Parents:
898a8b9
Message:

Fixed rst errors

File:
1 edited

Legend:

Unmodified
Added
Removed
  • src/sas/invariant/media/pr_help.rst

    r78f02c3 r23a9beb  
    1 ..pr_help.rst 
     1.. pr_help.rst 
    22 
    33.. This is a port of the original SasView html help file to ReSTructured text 
    44.. by S King, ISIS, during SasView CodeCamp-III in Feb 2015. 
     5 
     6.. |pi| unicode:: U+03C0 
     7.. |chi| unicode:: U+03C7 
    58 
    69P(r) Inversion Perspective 
     
    912The inversion approach is based on Moore, J. Appl. Cryst., (1980) 13, 168-175. 
    1013 
    11 P(r) is set to be equal to an expansion of base functions  of the type  
    12 phi_n(r) = 2*r*sin(pi*n*r/D_max). 
     14P(r) is set to be equal to an expansion of base functions of the type 
     15phi_n(r) = 2 * r * sin(|pi| * n * r / D_max). 
    1316 
    1417The coefficient of each base function in the expansion is found by performing  
    1518a least square fit with the following fit function: 
    1619 
    17 chi**2 = sum_i[ I_meas(q_i) - I_th(q_i) ]**2/error**2 + Reg_term 
     20|chi| ^2 = sum_i[ I_meas(q_i) - I_th(q_i) ]^2 / error^2 + Reg_term 
    1821 
    1922where I_meas(q) is the measured scattering intensity and I_th(q) is the  
     
    2124 
    2225The Reg_term term is a regularization term set to the second derivative  
    23 d**2P(r)/dr**2 integrated over r. It is used to produce a smooth P(r) output. 
     26d^2 P(r) / dr^2 integrated over r. It is used to produce a smooth P(r) output. 
    2427 
    2528The following are user inputs: 
    2629 
    27    - Number of terms: the number of base functions in the P(r) expansion.  
     30*  Number of terms: the number of base functions in the P(r) expansion. 
    2831    
    29    - Regularization constant: a multiplicative constant to set the size of  
    30 the regularization term. 
     32*  Regularization constant: a multiplicative constant to set the size of 
     33   the regularization term. 
    3134 
    32    - Maximum distance: the maximum distance between any two points in the  
     35*  Maximum distance: the maximum distance between any two points in the 
    3336   system. 
Note: See TracChangeset for help on using the changeset viewer.