>I was wondering if there is anyway to avoid having to type contrasts into
>the contrasts window in SPMwin. Is there anyway to tell SPMwin to simply
>look in a text file for the information or could the contrasts be copied
>and pasted from another file.
>
>Thanks,
>
Dear Dr Hernandez
The best to do is to type your contrast once in a "typical study" without
putting in the .vhd in your contrast box. Then save it -> It will be your
model. You will just have to file the boxes now with the .vhd files and
save it under a different name. But watch out : do not try to delete a .vhd
from the boxes after putting them in, otherwise you will loose all your
contrast (if it is long, save regularly).
May I ask question about computing time under PC and the the kind of PC and
data specifications that SPMwin user use ?
For example we use P166 64Mo UDMA 4Go
We have 64*64*32 (1 vol = 256 Ko) / 246 vol fMRI data repeated twice.
It takes approx 2 h for registration in bilinear without adjustment (the
fastest chose but surely not the best !)
Approx 3-4h for normalization in bilinear/12 affine mode without "basis
function", reslicing to 2*2*2 (single vol now 997 Ko).
2 h for smoothing (8mm)
24h for stat : testing 20 contrasts
Global quite 2 days for a single session
Storage is done by
For comparison, global time was cut by 2 when running it under a 266 MMX
128 Mo UDMA 6Go
Thanks to the authors of SPM, and to those who implement it under win ...
Sure it does not all what his grand brother do, but what a lovely
introduction !
However, visual C++ still harder to code than matlab, so next move for us
will be Linux. I appreciated the post send by the pioneers in this field.
Since I haven't head too much about the suggestion of using the error
matrix after covariates of no interest stat to compute a correlation coef,
should I consider it as valid / computable ? And more important, does it
have any sense ?
Sincerely
Dr Jack Foucher
4 bld du Pdt Edwards
67000 Strasbourg
Europe - France
tel & fax (33) (0)3 88 77 89 90
email : [log in to unmask]
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