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Dear Zeta, You can use spm_eeg_crop (Other/Crop) Vladimir On Wed, Aug 24, 2011 at 3:37 PM, Zita Patai <[log in to unmask]> wrote: > Hello! > > During my preprocessing i managed to make some participants' data a certain length (-800ms to 2000ms) and few others are a bit shorter (-800 to 1999ms) > This only became a problem when i tried to grand average my data, and now i was hoping there was a way to cut that 1ms off some of the participants' trials, so i don't have to go back to the epoching phase. > > i have tried to play with D.nsamles and D.time etc. but have failed. > > is there any way to do this so i do not have to go back to the beginning? > > Thank you!!! > zita >