Hi Jeffrey,
> i am trying to set up contrast in the contrast manager. i have a 36
> column design matrix based on every 6 columns equal one of my
> conditions. ie: 1a 1b 1c 1d 1e 1f 2a 2b 2c 2d 2e 2f 3a... 6f. so if i
> want to combine all the a's, i would enter into the contrast manager:
>
> 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0 1 0 0 0 0 0
Seems correct to me... does it work if you take out the last zeros? SPM
should zero-pad the contrast to the necessary length. Else, does it work
if you enter ones(1,36), just to see if it accepts 36 inputs? Also,
there were some who had problems defining contrasts in Win XP on older
SPM5 versions, so perhaps looking into this may help. Else, no idea.
Best,
Marko
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Marko Wilke (Dr.med./M.D.)
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Universitäts-Kinderklinik University Children's Hospital
Abt. III (Neuropädiatrie) Dept. III (Pediatric neurology)
Hoppe-Seyler-Str. 1, D - 72076 Tübingen
Tel.: (+49) 07071 29-83416 Fax: (+49) 07071 29-5473
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