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Hi Marko,

If you mean the Matlab command line: that should not be too difficult.

Something like

f=spm_get;
V=spm_vol(files);
v=spm_vol(V(1));
desiredMean=mean(v(:));

for f=2:length(V)
  v=spm_read_vols(V(f));
  v=v*desiredMean/mean(v(:));
  spm_write_vol(V(f),v);
end

should do the trick.

I don't know if the grand mean scaling routine does any other advanced
preparation steps, but this is grand mean scaling in its barest form.

regards
Alle Meije

On Fri, 2005-02-18 at 11:31 +0100, Marko Wilke wrote:
> Dear All,
> for an analysis outside of SPM (yes, it is possible :) I would like to
> implement grand mean scaling of a timeseries to a fixed value. Is it
> possible to implement this via the command line, using spm2-functions?
> As always, thanks in advance,
> Marko

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