Error when opening merged SPM.mat file

Hi everyone,

I merged 15 SPM.mat files (each is after 1st level analysis & estimation) into one file called SPM.mat. I tried to see the results on SPM12, but I got an error says that the file is not estimated! (I tried to estimate it but then I got another error says that SPM is not able to estimate the merged file!)

I'd really appriciate your help if any one has an idea about how to open the merged SPM.mat file using SPM-12 or how to deal with the error says "the file is not estimated" although the original subfiles that I merged, were estimated.

Thank you so much!

Muhammad Badarnee.

[Walter Roberson]

How did you do the merging?

[Muhammad Badarnee]

This is how I merged the files, let's say for two files, for example:

var1= load ('SPM1.mat')
var2= load ('SPM2.mat')
save spm.mat var1 var 2 

pls let me know what do you think.

Thanks,

MB.

Answer 1

[Walter Roberson]

var1= load ('SPM1.mat')
var2= load ('SPM2.mat')
save spm.mat var1 var2 

when you load() and assign the output to a variable, the output becomes a struct with one field for each input variable in the .mat file.

You are then storing those structure into spm.mat without extracting the content.

var1= load ('SPM1.mat');
var2= load ('SPM2.mat');

save('spm.mat', '-struct', 'var1');
save('spm.mat', '-struct', 'var2', '-append')

[Muhammad Badarnee]

Thank you so much, Walter.