Hello,

I am a little confused by the suggestions here, but maybe I am not getting something. My ISSS sequence is 3 volumes followed by 1 silent volume. So I need to zero pad my time series so that after every three volumes, I insert a zero or mean volume. Obviously I will need to pad my regressors accordingly.

1) How can I quickly generate the censor file using AFNI tools? I essentially need 60 sets of:

1
1
1
0

I assume I'd use 1deval or 1d_tool, but I can't figure out how to do this - sorry if this is a simple answer.

2) I am unclear what reordering means in the above posts. If I want to pad my EPI data, then do I need to add 60 volumes of zero or mean data at the end of my EPI and then reorder so that every 4th volume moves from the end to the proper location? Is there no way to directly insert one volume multiple times (like, I create one mean volume and then insert it after every 3 volumes if the EPI)?

I think those two questions will get me going, thanks.