gmane.comp.graphics.spm.marsbar

KIDLAB | 24 Sep 16:00

Combining Structural ROIs


Hello All,

  I have imported my structural ROI's from wfu pickatlas, but when I try to
combine them in Transform-Combine, it seems to hang up after I enter r1 & r2
& r3, with no information as to why in the matlab window.  I waited 15
minutes, just to make sure it just taking a while, but there is still
nothing.  Can someone help?

Thanks!
KIDLAB
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KIDLAB | 24 Sep 16:17

Re: Combining Structural ROIs


Hello again! 

   I just figured it out- the 'or (|)' command actually puts all the voxels
together between them, whereas I don't know what '&' is doing in this case,
because it doesn't work for my structural images.  Using '|' does work.

Thanks!
KIDLAB

KIDLAB wrote:
> 
> Hello All,
> 
>   I have imported my structural ROI's from wfu pickatlas, but when I try
> to combine them in Transform-Combine, it seems to hang up after I enter r1
> & r2 & r3, with no information as to why in the matlab window.  I waited
> 15 minutes, just to make sure it just taking a while, but there is still
> nothing.  Can someone help?
> 
> Thanks!
> KIDLAB
> 

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Matthew Brett | 24 Sep 19:12

Re: Combining Structural ROIs

Hi,

>   I just figured it out- the 'or (|)' command actually puts all the voxels
> together between them, whereas I don't know what '&' is doing in this case,
> because it doesn't work for my structural images.  Using '|' does work.

Yes, the '&' does a logical 'and' at each voxel, so retains only
voxels that are present in all three regions.

Best,

Matthew

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