Yes, I did try right clicking to set the upper threshold. When I left click, or right click, the respective bar moves, but the colour map remains unchanged. When I click "copy settings to layer" the bars almost always reset. I've managed to make them not reset at least once, but the colour map still remained unchanged and I've been unable to reliably reproduce this non-resetting behaviour.

Thanks! L

On 6-Apr-09, at 2:42 PM, Bruce Fischl wrote:

did you try right-clicking to set the upper threshold? On Mon, 6 Apr 2009, Lloyd Elliott wrote:

...

Hi,

I am trying to modify the colour map of an overlay in tksurfer. Unfortunately, the changes I make to the View -> Configure -> Overlay tcl/tk control are either ignored, or end in errors.

For example, if I left click on the histogram to set the lower thresh hold, and then click 'coppy settings to layer', then the thresh hold resets to the original value.

If I change the X Axis Range manually, for example by entering '6' in the Max edit box, then I get something like this error whenever I try to change something:

ERROR updating histo: impossible limits (min 6.73089 >= max 6.73089) for axis "x"

I'm guessing that this is a bug --- that is, it's not that I am misusing these controls.

I just want the brain to be coloured according to the whole range of values in my w file --- ie, for the heat map, the minimum should be the darkest blue and the maximum should be the brightest red (no gray where I guess freesurfer assumes p>whatever --- this overlay is not a statistical test). Any suggestions?

lloyd$ tksurfer --version stable4 lloyd$ uname -a Darwin 307-the-philosophers-foothold.local 9.6.0 Darwin Kernel Version 9.6.0: Mon Nov 24 17:37:00 PST 2008; root:xnu-1228.9.59~1/ RELEASE_I386 i386

surfer: current subjects dir: /Users/lloyd/work/subjects surfer: not in "scripts" dir ==> using cwd for session root surfer: session root data dir ($session) set to: surfer: /Users/lloyd surfer: Reading header info from /Users/mathpunk/work/subjects/ AAA03/ mri/T1.mgz surfer: vertices=123084, faces=246164

Thanks! L

PS --- a screenshot of these errors: http://mathpunk.churchturing.org/overlay-problems.png

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