compute the mean and stddev of your covariate, subtract the mean from
each covariate, and then divide the result by stddev.
On 9/28/16 3:47 PM, kinson li wrote:
Hi Greve
Thanks for your reply, can I have more detail about how to solve my
problem. By the way, I may not think it's the problem about covariates.
Thank you.
Jin
2016-09-28 15:29 GMT-04:00 Douglas Greve <gr...@nmr.mgh.harvard.edu
<mailto:gr...@nmr.mgh.harvard.edu>>:
Try normalizing your covariates (ie, subtract the mean and divide
by the stddev).
On 9/28/16 3:07 PM, kinson li wrote:
Hi there,
Anyone can help me out? Thank you.
2016-09-28 13:46 GMT-04:00 kinson li <kinson...@gmail.com
<mailto:kinson...@gmail.com>>:
/Hello,/
/I would like to conduct an analysis using mri_glmfit but I'm
getting this error:/
/ERROR: matrix is ill-conditioned or badly scaled, condno =
1e+08/
/I am appreciated you can help me solve this problem. /
/My command was:/
mri_glmfit --y age9vs8ml01.mgh --fsgd new.fsgd dods --C
age9vs8mlmatrix.mtx --surf fsaverage lh --cortex --glmdir
glmdir.age9vs8ml
Design matrix ------------------
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
1.000 0.000 8.000 0.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
0.000 1.000 0.000 9.000;
--------------------------------
ERROR: matrix is ill-conditioned or badly scaled, condno = 1e+08
--------------------------------
Thanks
Jincheng.
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