Reza,
There are several options to deal with your issue.
1) The easiest is probably to reverse the polarity of one of the
datasets (metric file columns) using Attributes: Metric: Metric File
Mathematical Operations: Multiply Column A by scalar. Choose the
relevant column, multiply by -1, and put the output in a new column.
(Then save the modified file).
2) Alternatively, create your own modified palette using the
Attributes: Palette: Edit, then generating a palette that has the
reverse assignments to the palette you are currently using. It's a
bit tedious generating a new palette, but is well worth it if you
have an ongoing need for a customized palette.
3) You might see whether one of the available color palettes in
SumsDB serves your purposes (e.g.,
http://sumsdb.wustl.edu/sums/archivelist.do?
archive_id=6613311&archive_name=COMBO_DVE-07_STANDARD.palette) meets
your
David
On Mar 3, 2007, at 2:30 PM, Reza Rajimehr wrote:
Hi,
I have successfully finished the deformation of the individual
human to
the human atlas, and the individual monkey to the monkey atlas. Our
human
experiment was BOLD, and the monkey experiment was MION. When
looking at
the deformed metric file as an overlay on the atlas brain, human and
macaque maps have different (opposite) color coding for the 2 stimulus
conditions (e.g. in the humans maps [BOLD], activity for stimulus A is
red/yellow, stimulus B is blue/cyan; and in the macaque maps [MION],
activity for stimulus B is red/yellow, stimulus A is blue/cyan).
This is
because of an opposite pattern of hemodynamic response for the BOLD
and
MION fMRI. My question is how I can reverse the polarity of the color
scale bar (e.g. in the macaque map), so that I have a consistent color
coding for the human and macaque maps.
Thanks,
Reza
********************************
Reza Rajimehr, MD
NMR Athinoula A. Martinos Center
Department of Radiology
Massachusetts General Hospital (MGH)
Building 149, 13th St.
Charlestown, MA 02129
Email: [EMAIL PROTECTED]
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