vb_lf_preprocess

 preprocess for making leadfield
 [usage]
   [Basis_mode, pick, Qpick, Wsensor, V0, V, xx] = ...
     vb_lf_preprocess(proj_root, basis_parm)
 [input]
    proj_root : <required> project root directory
   basis_parm : <required> <<struct>>
              :  data set in which the specification of calculation is defined
 basis_parm.brain_file : brain file (.brain.mat)
 basis_parm.area_file  : area file  (.area.mat)
 basis_parm.meg_file   : MEG data file (.meg.mat)
 basis_parm.Basis_mode : number of independent curent direction
       = 1 :  current vextor = xx(n,:)
       = 2 :  current vextor = orthogonal vectors to V(n,:)
       = 3 :  current vextor = xx(n,:) & orthogonal vectors to xx(n,:)
 basis_parm.normal_mode : 
       = 0 : normal vector at the vertex (Defualt)
       = 1 : average normal vector in the neighbor of BV original brain 

 basis_parm.area_key : Area key to specify possible current region <optional>
 [output]
  V(n,:)  : dipole position (3-D coordinate) at n-th vertex
 xx(n,:)  : dipole current direction (unit vector) at n-th vertex
  pick(k, 1:3) : sensor coil coordinate
 Qpick(k, 1:3)    : sensor coil direction

 Wsensor(m,n) = n-th coil weight for m-th sensor channel
    basis(channel,dipole) = Wsensor * basis(coil,dipole)
   Basis_mode : 
           V0 : center of sphere
 [note]
   <<prior-conditions>>
     1) proj_root is valid
     2) basis_parm is commonly valid
 [history]
   2007-01-26 (Sako) initial version
   2007-12-21 Masa-aki Sato
              parameter checks are changed
   2008-03-10 (Sako) modified in order to share check program with GUI

 Copyright (C) 2011, ATR All Rights Reserved.
 License : New BSD License(see VBMEG_LICENSE.txt)

0001 function [Basis_mode, pick, Qpick, Wsensor, V0, V, xx] = ...
0002   vb_lf_preprocess(proj_root, basis_parm)
0003 % preprocess for making leadfield
0004 % [usage]
0005 %   [Basis_mode, pick, Qpick, Wsensor, V0, V, xx] = ...
0006 %     vb_lf_preprocess(proj_root, basis_parm)
0007 % [input]
0008 %    proj_root : <required> project root directory
0009 %   basis_parm : <required> <<struct>>
0010 %              :  data set in which the specification of calculation is defined
0011 % basis_parm.brain_file : brain file (.brain.mat)
0012 % basis_parm.area_file  : area file  (.area.mat)
0013 % basis_parm.meg_file   : MEG data file (.meg.mat)
0014 % basis_parm.Basis_mode : number of independent curent direction
0015 %       = 1 :  current vextor = xx(n,:)
0016 %       = 2 :  current vextor = orthogonal vectors to V(n,:)
0017 %       = 3 :  current vextor = xx(n,:) & orthogonal vectors to xx(n,:)
0018 % basis_parm.normal_mode :
0019 %       = 0 : normal vector at the vertex (Defualt)
0020 %       = 1 : average normal vector in the neighbor of BV original brain
0021 %
0022 % basis_parm.area_key : Area key to specify possible current region <optional>
0023 % [output]
0024 %  V(n,:)  : dipole position (3-D coordinate) at n-th vertex
0025 % xx(n,:)  : dipole current direction (unit vector) at n-th vertex
0026 %  pick(k, 1:3) : sensor coil coordinate
0027 % Qpick(k, 1:3)    : sensor coil direction
0028 %
0029 % Wsensor(m,n) = n-th coil weight for m-th sensor channel
0030 %    basis(channel,dipole) = Wsensor * basis(coil,dipole)
0031 %   Basis_mode :
0032 %           V0 : center of sphere
0033 % [note]
0034 %   <<prior-conditions>>
0035 %     1) proj_root is valid
0036 %     2) basis_parm is commonly valid
0037 % [history]
0038 %   2007-01-26 (Sako) initial version
0039 %   2007-12-21 Masa-aki Sato
0040 %              parameter checks are changed
0041 %   2008-03-10 (Sako) modified in order to share check program with GUI
0042 %
0043 % Copyright (C) 2011, ATR All Rights Reserved.
0044 % License : New BSD License(see VBMEG_LICENSE.txt)
0045 
0046 abort_swt = true;
0047 [err_code, Basis_mode, pick, Qpick, Wsensor, V0, V, xx] = ...
0048   vb_basisparm_check(basis_parm, proj_root, abort_swt);
0049 return;
0050 
0051 %%% END OF FILE %%%