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., archive_id=6613311&archive_name=COMBO_DVE-07_STANDARD.palette) meets your


On Mar 3, 2007, at 2:30 PM, Reza Rajimehr wrote:


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.


Reza Rajimehr, MD

NMR Athinoula A. Martinos Center
Department of Radiology
Massachusetts General Hospital (MGH)
Building 149, 13th St.
Charlestown, MA 02129

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