Proc py motion regressor

AFNI Message Board
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Dear AFNI experts,

Could you please let me know what would the motion regressors and other noise regressors output files look like after completing proc py?

Best,
Jun

2

Sorry for being slow, Jun.

You could look at the motion files. etc., but you can see them in the X-matrix, X.xmat.1D.

In that file, different types of regressors are assigned to different groups. Group -1 includes the polort terms (polynomial baseline regressors), group 0 includes all other regressors of no interest (where you put them into the baseline model via 3dDeconvolve’s -stim_base option), and positive groups are for regressors of interest, from 1 on up (each class gets a different group number).

To see these groups, you can open X.xmat.1D in an editor, or use 1d_tool.py to show them. For example, list all groups, or list only baseline groups (-1 and 0):

1d_tool.py -show_group_labels -infile X.xmat.1D
1d_tool.py -select_groups -1 0 -show_group_labels -infile X.xmat.1D

Does that to what you like?

  • rick