Dear Deng,
you need to find out the coordinates in voxel space by:
inv(SPM.VM.mat)*[-22 -10 52 1]'
which gives:
57
59
63
1
when assuming that SPM.VM.mat looks like this:
-2 0 0 92
0 2 0 -128
0 0 2 -74
0 0 0 1
Then you can extract the betas using:
spm_get_data(SPM.Vbeta,[57 59 63]')
Regards,
Thilo
On Wed, 2014-03-05 at 13:04 +0000, SUBSCRIBE SPM Deng Wang wrote:
> Dear all,
>
> Does anyone know how to extract beta weights for a specific coordinate (for example MNI: x=-22;y=-10;z=52 or Talairach: x=-22;y=-16;z=49) in SPM8? I would appreciate it if you could reply to me.
>
> Best,
> Deng
