Reply-To: | | [log in to unmask][log in to unmask]>> wrote: > > > > Dear Alina, > > > > > > OK, you probably read the data correctly. Could you show us what your > > design matrix look like? To explore a bit further, you can also use > the > > "plot" button with the "contrast estimates" and "fitted responses" > > options. > > > > Best regards, > > Guillaume. > > > > > > On 03/04/17 16:20, Alina D wrote: > > > Hello, > > > > > > Thank you very much for replying. I did Extract data > betas > this > > > voxel and the only thing that happens is that matlab returns this : > > > > > > beta = > > > > > > 87.2718 > > > 265.9859 > > > > > > Before I tried to load the beta_0001.nii file and to get the > intensitied > > > of some voxels from there. > > > > > > Qse = 'beta_0001.nii'; > > > Wse = spm_vol(Qse); > > > Bse = spm_read_vols(Wse); > > > > > > I stored the coordinates of the voxels in a matrix of the form: > > > myindex3d = zeros(length(myindex),3) > > > > > > And then looped through the total number and ploted it : > > > scatter_data(ii) = Bse(myindex3d(ii,1),myindex3d( > ii,2),myindex3d(ii,3)) > > > > > > What would you suggest? > > > > > > Best wishes, > > > Alina > > > > > > On Mon, Apr 3, 2017 at 5:05 PM, Guillaume Flandin < > [log in to unmask] <mailto:[log in to unmask]> > > > <mailto:[log in to unmask] <mailto:[log in to unmask]>>> wrote: > > > > > > Dear Alina, > > > > > > How did you extract the data for a given voxel? What is > > displayed if, > > > when looking at results, you move the 'current voxel' (red > > arrow) to > > > your voxel of interest and do a right click while on the glass > > brain and > > > select Extract data > betas > this voxel in the contextual > > menu that > > > opens? > > > > > > Best regards, > > > Guillaume. > > > > > > > > > On 03/04/17 12:51, Alina Dinu wrote: > > > > Dear all, > > > > > > > > I am interested in the beta values for certain activated > > voxels.I > > > extracted them from the beta_0001 file. I have a couple of > > questions: > > > > 1. Could someone please tell me if this is this the correct > > file? > > > (given that I have a block design with only one condition) > > > > 2. After I plot them I notice that the values are too high > > (in the > > > order of 80-100) which is nonsensical for beta values. Could > > someone > > > please tell me if there is any kind of scalling done in this > file? > > > How are these values coded? > > > > 3. Could someone please tell me if this file also includes > the > > > confound mean predictor? > > > > > > > > Kind regards, > > > > Alina > > > > > > > > > > -- > > > Guillaume Flandin, PhD > > > Wellcome Trust Centre for Neuroimaging > > > University College London > > > 12 Queen Square > > > London WC1N 3BG > > > > > > > > > > -- > > Guillaume Flandin, PhD > > Wellcome Trust Centre for Neuroimaging > > University College London > > 12 Queen SqudB„b |