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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.)
                 [log in to unmask]

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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