Is it possible that you have duplicate filenames in the S.imgfiles input? If you email me the structure S, I can check this at least (if not, we might have to check the original con imgs too...).
R
-----Original Message-----
From: SPM (Statistical Parametric Mapping) [mailto:[log in to unmask]] On Behalf Of gj
Sent: 29 February 2012 11:34
To: [log in to unmask]
Subject: [SPM] error during estimation (ANOVA) "Matrix is close to singular"
Hi,
I'm trying to use Rik Henson's batch_spm_anova.m script (http://www.mrc-cbu.cam.ac.uk/people/rik.henson/personal/batch_spm_anova.m) to run a mixed ANOVA to compare my 2 groups, where I've specified the con files of select complex contrasts from my 1st level analysis for each subject of each group (same number of contrasts per group). During estimation I get the following error messages:
In spm_inv at 22
In spm_reml at 116
In spm_spm at 860
In batch_spm_anova at 311
In nm03_lev2mod4_genderDiff_fMRI at 338
Warning: Matrix is close to singular or badly scaled.
Results may be inaccurate. RCOND = -1.000000e+00.
In spm_inv at 22
In spm_reml at 119
In spm_spm at 860
In batch_spm_anova at 311
In nm03_lev2mod4_genderDiff_fMRI at 338
Warning: Matrix is singular, close to singular or badly scaled.
Results may be inaccurate. RCOND = NaN.
??? Error using ==> eig
Input to EIG must not contain NaN or Inf.
I had a glance through the forum archives, and I don't have any old F tests in the same folder....I'm not exactly sure -- is this error indicative of a scripting error I've made? Any suggestions/help appreciated!
Thx in advance,
g
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