afni.nimh.nih.gov

Hi Sam,

If you have to have a contrast-based non-zero mean in the time series, you could always compute the mean from all_runs and add it to the errts time series using 3dcalc, e.g.,

3dcalc -a errts+tlrc -b mean+tlrc -expr a+b

The -a dataset should be the time series, while it is okay for -b to be a single volume. The mean would be added to each time point.

- rick