function gui_help(which_help)
%
% Used by FASTICAG

% All the help texts and title used by GUI are stored here. 
% Make changes here.
% Also displays the helpwindow with the selected text

% Hugo G鋠ert
% 15.1.2001



%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
switch which_help
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
case 'pcamat'

  helptitle = 'FastICA: Reduce dimension';
  helptext=[ ...
    'You may reduce the dimension of the data by selecting only the     '
    'subspace corresponding to certain eigenvalues of the covariance    '
    'matrix of the data. Give the indices of the first and last         '
    'eigenvalues (sorted in descending order) to be included (all       '
    'eigenvalues in between will be included as well).  The eigenvalues '
    'and their indices can be seen in the graphical plot now on the     '
    'screen. The heights of the bars give the eigenvalues, with indices '
    'below.                                                             '
    '                                                                   '
    'For example, give ''1'' and ''n'' if you want to reduce the dimension  '
    'to n by principal component analysis, which means discarding the   '
    'subspaces corresponding to the smallest eigenvalues. Such a        '
    'dimension reduction may reduce noise and improve the performance of'
    'ICA.                                                               '];


%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
case 'gui_cb_about'

  helptitle='About FastICA';
  helptext =[ ...
    'FastICA for Matlab 5.x                                                    '
    'Version 2.1, January 15 2001                                              '
    'Copyright (c) Hugo G鋠ert, Jarmo Hurri, Jaakko S鋜el