Dear colleagues,
we ran into a problem while defining contrasts using the contrast
manager. Our design is 8 events/session (146 volumes/session,
event-related design) with 5 sessions overall in one design matrix.
Defining a new t-test contrast for the first event of all sessions ("1 0
0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0 0 0 1 0 0 0 0 0
0 0") fails with error msg. "!invalid contrast". Using "1 -1 ...."
instead surprisingly works. Has anyone a clue for this ? May it be that
the design is to large ?
Thanks for your kind support.
Best regards
Stephan
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Stephan G. Erberich Univ. Hospital, Univ. of Technology RWTH
(PhD graduate student) Dept. of Neuroradiology
Pauwelsstrasse 30
D-52057 Aachen
Germany
phone: ++49-(0)241-8088-890
fax: ++49-(0)241-8099-505
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