Hi,
I want to do a small volume correction in a spherical ROI defined from another group contrast in my study. I created a spherical ROI centred in a certain coordinate with 5-mm radius (called sphere_roi.nii.gz), enter the cope directory that I want to analyse, and then run:
randomise -i filtered_func_data.nii.gz -o output_directory -d design.mat -t design.con -m sphere_roi.nii.gz -T -c 2.3
The permutation then started but, before that, there appeared a message:
Warning: All design columns have zero mean - consider using the -D option to demean your data.
Anywhere wrong? Should I do anything, such as adding -D?
Thanks in advance.
Mark
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