[MINC-users] inf values in MINC files

[Soren Christensen]

Thanks for tip.
I tried

minccalc -clobber -illegal_value 1 -expression "A[0]*0" TTPfit.mnc test.mnc

hoping that all 0*inf operations would result in 1 in the resulting image
(usually this would be a NaN). the resulting image i ranged 0-0
I also tried a few other variants but either end up with a 0-inf or 0-0
ranged image.

Finally,
minccalc -clobber  -expression "A[0]>100" TTPfit.mnc test.mnc

Works because 100 is the largest non-infinite value - I guess this opens a
way to do what I want be first determining max and then doing the above.

If there is a smarter way I'd like to know.

Regards
Soren



On Thu, Jul 31, 2008 at 10:44 PM, Claude LEPAGE <claude at bic.mni.mcgill.ca>wrote:

> Nothing like "minccalc -help"...
> Try -zero or -illegal_value <val>. There are similar
> options too to treat illegal numbers.
>
>
> > Hi,
> >  I have some parameter maps that may contain 'inf' values. I noticed they
> > fail to render in Display and thought of writing a wrapper that replaces
> inf
> > with the highest non-inf value in the dataset - just for display
> purposes. I
> > wanted to use mincstats -max   to determine presence of infs, but it does
> > not  identify  inf as the max  value - is there another way to tease out
> > these inf voxels?
> > Should mincmath handle infs?   I don't seem to be able to find them using
> > -eq inf either.
> >
> > Cheers
> > Soren
> > _______________________________________________
> > MINC-users at bic.mni.mcgill.ca
> > http://www2.bic.mni.mcgill.ca/mailman/listinfo/minc-users
> >
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