'cname' error - sPM contrasts

Hi everyone,

Im trying to run a script to do some contrasts (1-st level analyses) for fmri data.

I get this error, 'Undefined function or variable, cname' and I dont know how to fix it.

This is the script I use

clear

addpath(genpath('C:\Users\nh852914\Documents\SPM\spm8\')) %SPM directory
directory = 'E:\Reshma\Task_horizontal\HC\'; % directory of the participant folders
onsets_dir = 'E:\Reshma\Beh data\HC\'; % directory wherethe files with the onsets are
output_dir = 'E:\Reshma\Analysis\Contrasts\HC\'; %directory where the contrasts should be saved
error_dir = 'E:\Reshma\Analysis\Contrasts\errors\'; %directory where the errors should be saved
hard_drive_basepath = 'E:/'; % directory before /RL_MDD/Analysis/Contrasts/
scan_group = 'HC'; % folder in the /RL_MDD/Analysis/Contrasts/ folder (HC or MDD)

   cd(directory);
  Folders = dir;

spm_get_defaults
global defaults

for ppt = [4] 
     try
        clearvars -except ppt directory error_dir Folders  onsets_dir output_dir hard_drive_basepath scan_group

           cd(directory);
          Folder = Folders(ppt).name;
          input_dir = [directory Folder '/'];

           pptID = Folder;

           output_dir2 = [output_dir pptID '/'];
          cd(output_dir2)

         load('SPM.mat')
  if length(SPM.xCon) == 0
              SPM.xCon = spm_FcUtil('Set',cname,'T','c',c(:),SPM.xX.xKXs);
          else
              SPM.xCon(end + 1) = spm_FcUtil('Set',cname,'T','c',c(:),SPM.xX.xKXs);
          end 

           %1 Hit_b1 ------------------------------------------------------------------
           c = [1 0 zeros(1,29)];
           cname = 'Hit_b1';
           SPM.xCon(end + 1) = spm_FcUtil('Set',cname,'T','c',c(:),SPM.xX.xKXs);

           %2 Hit_b2 ------------------------------------------------------------------
           c = [zeros(1,2) 1 0 zeros(1,27)];
           cname = 'Hit_b2';
           SPM.xCon(end + 1) = spm_FcUtil('Set',cname,'T','c',c(:),SPM.xX.xKXs);

            %3 Hit_b3 ------------------------------------------------------------------
           c = [zeros(1,4) 1 0 zeros(1,25)];
           cname = 'Hit_b3';
           SPM.xCon(end + 1) = spm_FcUtil('Set',cname,'T','c',c(:),SPM.xX.xKXs);

cd(output_dir2)

          participant_number = pptID;

copyfile('con_001.img',strcat(hard_drive_basepath, '/Reshma/Analysis/Contrasts/', scan_group, '/', participant_number, '_Hit_b1.img'));
        copyfile('con_001.hdr',strcat(hard_drive_basepath, '/Reshma/Analysis/Contrasts/', scan_group, '/', participant_number, '_Hit_b1.hdr'));
        copyfile('con_002.img',strcat(hard_drive_basepath, '/Reshma/Analysis/Contrasts/', scan_group, '/', participant_number, '_Hit_b2.img'));
        copyfile('con_002.hdr',strcat(hard_drive_basepath, '/Reshma/Analysis/Contrasts/', scan_group, '/', participant_number, '_Hit_b2.hdr'));
        copyfile('con_003.img',strcat(hard_drive_basepath, '/Reshma/Analysis/Contrasts/', scan_group, '/', participant_number, '_Hit_b3.img'));
        copyfile('con_003.hdr',strcat(hard_drive_basepath, '/Reshma/Analysis/Contrasts/', scan_group, '/', participant_number, '_Hit_b3.hdr'));

catch ME
        save([error_dir pptID '_error_first_level_analysis'], 'ME')
        disp(['error for subject ' pptID ]);
        continue
    end

      disp(['successfully ran analysis for subject ' pptID]);

end

Any idea on how to sort it?

Thanks a lot!

alexandra

Answer 1

[Walter Roberson]

You have

load('SPM.mat')

That SPM.mat file is expected to contain a variable named cname . Looking in other places, it appears that cname is expected to be either a cell array of character vectors of contrast names, or else possibly a single character vector containing a contrast name. The contrast names are possibly file names; I am not certain.