Re: [Marsbar-users] Creating ROIs using getdata() vs '&'

[jayhegde <he...@um...>]

Just so there is no misunderstanding about how I created an ROI using
getdata(), I wish to add that to create rois using getdata(), I used the
vXYZ output of getdata() and converted into real coordinates.
Thanks,
Jay



jayhegde wrote:
> 
> Hi,
>      I like using both getdata () and the & operation for creating ROIs,
> depending on the output I want.  But I'm having trouble understanding how
> they work -- specifically, why they produce different ROIs in the
> following case:
>      
>      I have a binarized ROI ('myroi') of type maroi_matrix.  I have a T
> contrast image 'spmT_0001.img'.
> I read in the contrast image and convert it to an maroi_matrix object,
> 'act_roi'.  The 'spmT_0001.img' and 'act_roi are otherwise identical;
> neither is binarized.
> 
>         newroi1 = myroi & act_roi;
>         newroi2 = getdata(myroi, spmT_0001.img);
> 
>      I expect newroi1 and newroi2 to be identical, but they're not.  Why
> is this?
>      Thank you very much,
>      Jay
> 

-- 
View this message in context: http://www.nabble.com/Creating-ROIs-using-getdata%28%29-vs-%27-%27-tf4474883.html#a12759426
Sent from the MarsBaR mailing list archive at Nabble.com.