Home > rest_20090422 > rest_Corr2FisherZ.m

rest_Corr2FisherZ

PURPOSE ^

Fisher Z score transformation

SYNOPSIS ^

function rest_Corr2FisherZ(ACorrMapFilename, AZScoreMapFilename, AMaskFilename)

DESCRIPTION ^

    Fisher Z score transformation
Usage:
    rest_Corr2FisherZ(ACorrMap, AZScoreMap, AMaskFilename)
    ACorrMapFilename,            Input, Original Pearson Product Moment correlation map
    AZScoreMapFilename,        Output, Fisher Z score map
    AMaskFilename,        Input, Mask file

-----------------------------------------------------------
    Copyright(c) 2007~2010
    State Key Laboratory of Cognitive Neuroscience and Learning in Beijing Normal University
    Written by Xiao-Wei Song 
    http://resting-fmri.sourceforge.net
     Mail to Authors:  <a href="Dawnwei.Song@gmail.com">Xiaowei Song</a>; <a href="ycg.yan@gmail.com">Chaogan Yan</a> 
    Version=1.3;
    Release=20090321;
   Revised by YAN Chao-Gan, 080610. NIFTI compatible
   Last Revised by YAN Chao-Gan, 090321. Result data will be saved in the format 'single'.
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CROSS-REFERENCE INFORMATION ^

This function calls: This function is called by:

DOWNLOAD ^

rest_Corr2FisherZ.m

SOURCE CODE ^

0001 function rest_Corr2FisherZ(ACorrMapFilename, AZScoreMapFilename, AMaskFilename)
0002 %    Fisher Z score transformation
0003 %Usage:
0004 %    rest_Corr2FisherZ(ACorrMap, AZScoreMap, AMaskFilename)
0005 %    ACorrMapFilename,            Input, Original Pearson Product Moment correlation map
0006 %    AZScoreMapFilename,        Output, Fisher Z score map
0007 %    AMaskFilename,        Input, Mask file
0008 %
0009 %-----------------------------------------------------------
0010 %    Copyright(c) 2007~2010
0011 %    State Key Laboratory of Cognitive Neuroscience and Learning in Beijing Normal University
0012 %    Written by Xiao-Wei Song
0013 %    http://resting-fmri.sourceforge.net
0014 %     Mail to Authors:  <a href="Dawnwei.Song@gmail.com">Xiaowei Song</a>; <a href="ycg.yan@gmail.com">Chaogan Yan</a>
0015 %    Version=1.3;
0016 %    Release=20090321;
0017 %   Revised by YAN Chao-Gan, 080610. NIFTI compatible
0018 %   Last Revised by YAN Chao-Gan, 090321. Result data will be saved in the format 'single'.
0019 %-----------------------------------------------------------
0020 
0021     if ~(nargin==3) error(' Error using ==> rest_Corr2FisherZ. 3 arguments wanted.'); end
0022 
0023     %Load the original ReHo map file
0024     [BrainMap,VoxelSize, Header]=rest_readfile(ACorrMapFilename);
0025     nDim1 = size(BrainMap,1); nDim2 = size(BrainMap,2); nDim3 = size(BrainMap,3);
0026     BrainSize = [nDim1 nDim2 nDim3]; VoxelSize =VoxelSize';    
0027     mask=rest_loadmask(nDim1, nDim2, nDim3, AMaskFilename);
0028         
0029     pos=find(mask);
0030     BrainMap(pos) =0.5 * log((1 +BrainMap(pos))./(1- BrainMap(pos)));
0031     rest_writefile(single(BrainMap),AZScoreMapFilename,BrainSize,VoxelSize,Header, 'single'); %Revised by YAN Chao-Gan, 090321. Result data will be stored in 'single' format. %'double');
0032 
0033

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