table of contents
LIPSIA     Compute a contrast or a zmap from beta files
vgetcontrast
The program 'vgetcontrast' computes a contrast map, a tmap, or a zmap from a beta-file. Beta-files are generated by 'vcolorglm'.

Example:

vgetcontrast -in beta.v -con 0 0 1 0 -1 0 0 -out cmap.v -type conimg

This call produces a contrast image from a beta map using the contrast vector 0 0 1 0 -1 0 0.

The length of the contrast vector must agree with the design file dimension, i.e., the length of the contrast vector must coincide with the number of covariates (number of columns ins the design matrix). The right number of covariates can be obtained using the program 'vcheckdesign'.

Parameters of 'vgetcontrast ':
-help
Prints usage information.
-in
One or more fMRT data file(s). Default: (none)
-out
Output beta file. Default: (none)
-type [ conimg | tmap | zmap ]
Type of output. Default: conimg
-contrast
Contrast vector.


Max Planck Institute for Human Cognitive and Brain Sciences. Further Information: lipsia@cbs.mpg.de
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