Dear Geon-Ho,
something went wrong while estimating spatial smoothness of the residuals
of your 2nd level model. This is difficult to track, but you should check
your data - they may have sharp edges in them, or they may have only
discrete values - try looking at an histogram of your data using the
volumes toolbox.
Volkmar
On Thu, 6 Sep 2007, Geon-Ho Jahng wrote:
> Dear All,
>
> After we finish the first level analysis, we try to analyze the second level
> using "con" images with paired t-test of pre- and post- fMRI task.
> During the Estimation of the paired T-test model, I got the following error
> message. Please give me an advise how to solve?
>
>
> Plane 69/69 , block 2/2 : ...closing files
> Spatial non-sphericity (over scans) : ...estimating derivatives
> Spatial non-sphericity (over scans) : ...writing resels/voxel image
>
> Warning: Divide by zero.
> (Type "warning off MATLAB:divideByZero" to suppress this warning.)
>> In C:\MATLAB6p5\toolbox\matlab\datafun\mean.m at line 26
> In c:\spm\spm2\spm_est_smoothness.m at line 150
> In c:\spm\spm2\spm_spm.m at line 880
> Warning: Divide by zero.
> (Type "warning off MATLAB:divideByZero" to suppress this warning.)
>> In C:\MATLAB6p5\toolbox\matlab\datafun\mean.m at line 26
> In c:\spm\spm2\spm_est_smoothness.m at line 151
> In c:\spm\spm2\spm_spm.m at line 880
> ??? Second argument must be numeric, real, full and double.
>
> Error in ==> c:\spm\spm2\spm_resels_vol.dll
> Error in ==> c:\spm\spm2\spm_spm.m
> On line 881 ==> R = spm_resels_vol(VM,FWHM)';
>
> ??? Error while evaluating uicontrol Callback.
>
>>>
> Best
> Geon-Ho
>
>
>
>
>
--
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/
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