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Your model has 18 timepoints but your data only has 15! Steve. On 14 May 2007, at 16:21, Suzanna Laycock wrote: > Hi Steve, > > It says the following: > > Suzanna@suzanna ~/FSL_DATA/tbss/stats > $ avwinfo all_FA_skeletonised > data_type > dim1 182 > dim2 218 > dim3 182 > dim4 15 > datatype 16 > pixdim1 -1.0000000000 > pixdim2 1.0000000000 > pixdim3 1.0000000000 > pixdim4 1.0000000000 > cal_max 0.0000 > cal_min 0.0000 > glmax 0 > glmin 0 > origin1 91 > origin2 127 > origin3 73 > file_type ANALYZE-7.5 > > > -----Original Message----- > From: FSL - FMRIB's Software Library > [mailto:[log in to unmask]] On Behalf Of Steve Smith > Sent: 11 May 2007 15:19 > To: [log in to unmask] > Subject: Re: [FSL] randomise > > > What does > avwinfo all_FA_skeletonised > say? > > > > On 11 May 2007, at 14:35, Suzanna Laycock wrote: > >> Hi, >> >> I'm trying to run the last part of tbss - randomise, and I get the >> following error message. Any suggestions why? I have 9 control >> and 9 patient subjects. Below is the design.mat and design.con >> files. >> >> Suzanna@suzanna ~/FSL_DATA/tbss/stats >> $ design_ttest2 design 9 9 >> >> Suzanna@suzanna ~/FSL_DATA/tbss/stats >> $ randomise -i all_FA_skeletonised -o tbss -m mea n_FA_skeleton_mask >> -d design.mat -t design.con -n 5000 -c 3 -V >> 48620 permutations required for exhaustive test >> number of rows in design matrix doesn't match numb >> er of "time points" in input data! >> >> >> My design.mat is: >> >> /NumWaves 2 >> /NumPoints 18 >> /PPheights 1 1 >> /Matrix >> 1 0 >> 1 0 >> 1 0 >> 1 0 >> 1 0 >> 1 0 >> 1 0 >> 1 0 >> 1 0 >> 0 1 >> 0 1 >> 0 1 >> 0 1 >> 0 1 >> 0 1 >> 0 1 >> 0 1 >> 0 1 >> >> And my design.con is: >> >> /NumWaves 2 >> /NumContrasts 2 >> /PPheights 1 1 >> /Matrix >> 1 -1 >> -1 1 >> > > > ---------------------------------------------------------------- > -------- > --- > Stephen M. Smith, Professor of Biomedical Engineering > Associate Director, Oxford University FMRIB Centre > > FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK > +44 (0) 1865 222726 (fax 222717) > [log in to unmask] http://www.fmrib.ox.ac.uk/~steve > ---------------------------------------------------------------- > -------- > --- ------------------------------------------------------------------------ --- Stephen M. Smith, Professor of Biomedical Engineering Associate Director, Oxford University FMRIB Centre FMRIB, JR Hospital, Headington, Oxford OX3 9DU, UK +44 (0) 1865 222726 (fax 222717) [log in to unmask] http://www.fmrib.ox.ac.uk/~steve ------------------------------------------------------------------------ ---