Brain Imaging & Analysis Center

usage: -expr censor [timeref] [flag]

 -expr censor [ref] [flag [fillindex] [fillimages]]		

CENSOR replaces flagged time points with new values. By default, time points are flagged using the data set's “ACTIVE” reference timeline (0/1 value for each image). Alternatively, time points can be flagged by explicitly specifying a reference time course (TIMEREF).

All voxels in images with a 0 reference value will be replaced according the the FLAG argument, as:
FLAG:

• 0 - replace with linear interpolation of surrounding time points (default)
• 1 - replace with spline interpolation of surrounding time points
• 2 - replace with zeros
• 3 - excise the value (result is fewer time points)

Other FLAG values can be combined with the above byb addition:

• 4 - adjust values after 0 reference values to have similar means to earlier values (matches means of 3 values before and after)
• 8 - The TIMEREF is a list of time point indices to censor (default is TIMEREF is 0/1 flag for every timepoint)
• adjust values after censored values to have similar means to earlier values (matches means of 3 values before and after)

			/* val:  0 - (default) replace with linear interpolation; or
			             same as VAL=8 if VAL2 is non-zero
					 1 - replace with spline interpolation
					 2 - replace with 0's
					 3 - excise
					 4 - match post-mean to pre-mean
					 8 - replace with value at 1st censored timept at or after timept VAL2
					 9 - replace with value at 1st uncensored timept at or after VAL2
					10 - replace with value at timept VAL2
					16 - active is t-index; otherwise is 0/1 flag

See Also:
fScan Home, fScan Manual, CmdLineOptions, Expression Command, Manual Help