Thank you for the reply Douglas,

Factor 1 (diagnosis) has 3 levels (BPD, CCP, NPC). I created using the vi editor, one line for each level. Same as factor 2.

Max



On dijous 14 gener 2016 22:20 CET, Douglas N Greve <greve@nmr.mgh.harvard.edu> wrote:

> how many levels does factor 1 have? How did you make the factor file?

>
> On 01/14/2016 05:30 AM, BAUTISTA-PERPINYA Maximilià wrote:
> > Hi there experts,
> >
> > I'm runing qdec to analyze my subject data. I am able to import the qdec.table.dat, but the problem comes in the Design step. I select 'Volume-based' measure, 'Diagnosis' as my discrete independent variable and 'LeftAmygdala' as the continuous variable. I don't select any nuisance factor. I then set my Design Name: 'LAmyDiagnosis' and click Analyze, but gives me the following error:
> >
> > ---------------------------------------------------------------------------------------------------------------
> >
> > ERROR: QdecGlmDesign::GenerateContrasts: factor 1 must have 2 levels
> > ninputs = 137
> > Checking inputs
> > nframestot = 137
> > Allocing output
> > Done allocing
> > nframes = 137
> > Writing to /home/freesurfer/Desktop/test005/subjects/qdec/LAmyDiagnosis/y.mgh
> > gdfReadHeader: reading /home/freesurfer/Desktop/test005/subjects/qdec/LAmyDiagnosis/qdec.fsgd
> > INFO: DeMeanFlag keyword not found, DeMeaning will NOT be done.
> > Continuous Variable Means (all subjects)
> > 0 LeftAmygdala 1502.65 189.974
> > Class Means of each Continuous Variable
> > 1 diagnosisBPD 1497.7548
> > 2 diagnosisCCP 1540.8923
> > 3 diagnosisNPC 1488.5490
> > INFO: gd2mtx_method is dods
> > Reading source surface /home/freesurfer/Desktop/test005/subjects/fsaverage/surf/lh.white
> > ERROR: no contrasts specified.
> > Error in Analyze: command failed: mri_glmfit --y /home/freesurfer/Desktop/test005/subjects/qdec/LAmyDiagnosis/y.mgh --fsgd /home/freesurfer/Desktop/test005/subjects/qdec/LAmyDiagnosis/qdec.fsgd dods --glmdir /home/freesurfer/Desktop/test005/subjects/qdec/LAmyDiagnosis --surf fsaverage lh
> >
> > ---------------------------------------------------------------------------------------------------------------
> >
> > Any recommendations? Any help is much appreciated :)
> >
> >
> > Best,
> >
> > Max
> >
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> >
> >
>

> -- Douglas N. Greve, Ph.D.
> MGH-NMR Center
> greve@nmr.mgh.harvard.edu
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--
Maximilià Bautista-Perpinyà, BSc
Master student at Joint Master in Neuroscience (JMN)
Université de Strasbourg (in partnership with Universität Freiburg and Universität Basel)
&
Master Intern at Biological and Personality Psychology Laboratory
Department of Psychology, Universität Freiburg

(+49) 015759302368
maximila.bautista-perpinya@etu.unistra.fr
maxbauper@gmail.com

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