Hi Sinead, you cannot use QDEC for this design since it has one factor with 3 levels (only 2 levels possible now). You can create an FSGD file, follow the example here:
http://surfer.nmr.mgh.harvard.edu/fswiki/Fsgdf3G0V doug On 05/09/2013 06:42 AM, Sinead Kelly wrote: > Dear all, > > I am trying to run statistical analysis on cortical thickness data > using Qdec. I have one group of control subjects that are split into > three genotype groups. I want to investigate if cortical thickness > significantly between the three genotype groups. Is it possible to > look at differences between three groups using Qdec? I am getting the > following error when I try to analyse - ERROR: QdecGlmDesign::Create: > zero factors! > > I would really appreciate if anyone could shed some light on this for > me as this is the first time I have used Qdec and I don't know what is > causing this error. > > Thank you for your help. > > Sinead > > -- > Sinead Kelly > Neuropsychiatric Genetics Group > Trinity Centre > St. James's Hospital > Dublin 8 > > > _______________________________________________ > Freesurfer mailing list > [email protected] > https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer -- Douglas N. Greve, Ph.D. MGH-NMR Center [email protected] Phone Number: 617-724-2358 Fax: 617-726-7422 Bugs: surfer.nmr.mgh.harvard.edu/fswiki/BugReporting FileDrop: https://gate.nmr.mgh.harvard.edu/filedrop2 www.nmr.mgh.harvard.edu/facility/filedrop/index.html Outgoing: ftp://surfer.nmr.mgh.harvard.edu/transfer/outgoing/flat/greve/ _______________________________________________ Freesurfer mailing list [email protected] https://mail.nmr.mgh.harvard.edu/mailman/listinfo/freesurfer The information in this e-mail is intended only for the person to whom it is addressed. If you believe this e-mail was sent to you in error and the e-mail contains patient information, please contact the Partners Compliance HelpLine at http://www.partners.org/complianceline . If the e-mail was sent to you in error but does not contain patient information, please contact the sender and properly dispose of the e-mail.
