| When performing global normalisation using proportional scaling in
| SPM99, is it possible to change the default fullmean/8 mask to say
| fullmean/4 or whatever?
|
| Can anybody point me in the right direction with this.
I'm afraid that this is not possible yet, as the threshold is still hardcoded
into the routine. If you want to try different thresholds, then you need to
modify line 57 of spm_global.c, and then recompile. The modification would
involve something like changing from:
s1/=(8.0*m);
to:
s1/=(4.0*m);
SPM99 was supposed to include an option to change this threshold, but I forgot
to incorporate it.
All the best,
-John
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