fScan Reference Manual, Chapter 2 (CmdLineOptions): mean
usage: -mean [VERBOSE] cond ref name wsiz
Create a set of mean images using the grouping codes defined by the -reference options. When combined with -movie the means may be converted to t-maps.
For example, if a task code with multiple conditions was specified to create codes for time after event start, with each condition separated into code blocks of 100 (e.g. -input eventspec - 1 - 100), separate averaged time courses 10 seconds long could be created using '-mean meanfile - 10 100'
Note: If “verbose” appears immediately after MEAN, the command will display image sorting information before it executes.