Dear Layla,
this happens sometimes if SPM for some reason can not estimate error
covariance properly. For a paired t-test, I would guess that your sample
size may be too small or the data violates some of the assumptions for
paired t-tests.
Volkmar
Am Sonntag, den 25.01.2009, 08:59 -0800 schrieb layla sara:
> Dear SPMers,
> When I run paired t-test, and go in to define contrast, I obtain error
> pasted in the bottom of this message. No errors appear during
> estimation. Also, I checked, and my SPM.xX.nKX does in fact have
> complex values!
> Few more pieces of perhaps useful info: error occurs when I run
> analysis with smoothed data, but does not occur on unsmoothed images
> of the same dataset (other params set exactly the same). Also, I am
> running SPM5, and have recently re-installed the updates.
> Any help or advice would be tremendously appreciated.
>
> Regards,
> -Layla
>
>
> ??? Error using ==> image
> Error using ==> image
> Image CData can not be complex.
>
> Error in ==> spm_conman at 960
> hDesMtxIm = image((varargin{2}.nKX+1)*32);
>
> Error in ==> spm_conman at 929
> spm_conman('ImDesMtx',xX, H.hDesMtxAx) %-Depict
> DesMtx
>
> Error in ==> spm_conman at 812
> [F,cF] =
> spm_conman('Initialise','on',SPM,STATmode,n,Prompt,Mcstr,OK2chg);
>
> Error in ==> spm_getSPM at 278
> [Ic,xCon] = spm_conman(SPM,'T&F',Inf,...
>
> Error in ==> spm_results_ui at 264
> [SPM,xSPM] = spm_getSPM;
>
> ??? Error while evaluating uicontrol Callback.
--
Volkmar Glauche
-
Department of Neurology [log in to unmask]
Universitaetsklinikum Freiburg Phone 49(0)761-270-5331
Breisacher Str. 64 Fax 49(0)761-270-5416
79106 Freiburg http://fbi.uniklinik-freiburg.de/
|