Hi,
I am very sorry to trouble you again. The demo in the learning materials (PPI) you mentioned is also about block design fMRI with the duration of 20s. I have read every word in the learning materials you provided but I haven't found the answers. On the contrary, they make me more confused because some operation in these materials is so different from the link I mentioned(gPPI). The questions I asked before remain unsolved, and besides, I have two more questions:
5)What's the function of the symbol ':t' in tcsh scripts? I find ':t' in many rows in the scripts you provided (PPI), for example, 'set seed = $seed:t' and
'set tfile = $timingdir/$stim_files[$sind]:t' in the script 'cmd.ppi.2.make.regs'.
6)The inputs ( pb04.*) of gPPI in the link I mentioned are signal values while the inputs of PPI in the scripts you provided are the residual error time series generated by regression. Is that the difference between gPPI and PPI?

I've consulted a lot of senior colleagues in our institute before these questions are published here. But they all know little about the answers besides using the same script provided in this link ( gPPI ) to all experiments.
If you are busy, you need not to reply me until you have enough free time.
Thank you!
Po



Edited 4 time(s). Last edit at 03/24/2017 04:42AM by Ren Po.