- Purpose: This command allows the user to apply a highpass and lowpass filter to the functional dataset.
3dFourier \ -prefix my_filtered_fxnls \ -lowpass .2 \ -highpass .008 \ mydataset+orig
- The subcommand "-prefix" is used to specify the output file after filtering is complete.
- The subcommand "-lowpass .2" tells 3dFourier that you want to eliminate anything within your data that has a frequency of .2 Hz or higher
- "-highpass .008" tells 3dFourier to filter anything within your data that has a frequency of .008 or lower.