Re: [Marsbar-users] problem extracting signal changes

[Matthew B. <mat...@gm...>]

Hi,

On Mon, Oct 24, 2011 at 5:46 AM, Robert Lech <Rob...@ru...> wrote:
> Dear Marsbar users,
>
> I'm new to Marsbar and just tried to extract signal changes for the
> first time, using a script that is often used in our lab (and is built
> from the suggestions in the Marsbar FAQ). After defining functional ROIs
> (as described in the online tutorial) i tried to run the modified script
> and got following error message:
>
>
> Error in ==> maroi.getdata at 30
> if nargin < 2
>
> { ??? Output argument "vXYZ" (and maybe others) not assigned during call
> to "D:\Eigene
> Dateien\spm8\toolbox\marsbar-0.42\@maroi\getdata.m>getdata".
>
> Error in ==> maroi.get_marsy at 76
>   [y vals vXYZ mat]  = getdata(o, VY);
>
> Error in ==> extractPSC at 11
> Y  = get_marsy(R, D, 'mean');
>
>
> The problem seems to be in the last part of the error message, trying to
> fetch data into a marsbar data object. The strange thing is that the
> script does work for approx. half of the subjects, but doesn't for the
> rest. Does anyone have an idea what could be the problem?

Do you think you have run into something like this problem?:

http://marsbar.sourceforge.net/faq.html#why-do-i-get-a-no-valid-data-for-roi-warning-when-extracting-data

Unfortunately the 'hold' fix in that entry doesn't work because of a
bug in marsbar, I hope to release a few fixes, including that one, in
the next few days.

Best,

Matthew