Dear All,
I would like to use spm_peb_ppi.m to generate the PPI. After reading the comment of this file, I was only not clear about the parameter called 'Uu'.
Uu - Matrix of input variables and contrast weights. This is an
[n x 3] matrix. The first column indexes SPM.Sess.U(i). The
second column indexes the name of the input or cause, see
SPM.Sess.U(i).name{j}. The third column is the contrast
weight. Unless there are parametric effects the second
colulmn will generally be a 1.
What does the n here mean? Does it mean the number of scans within one run? What's more, SPM.Sess.U(i) is a structure with several fields so I don't know how to put it in one column.
Any suggestions are welcom. Thanks a lot!
Best wishes,
Yang
ICN, ECNU, Shanghai, China
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