You have commas (ie, ",") instead of decimal points (ie, ".") in your fsgd file. Try replacing them and see if that works
On 03/16/2017 08:59 AM, teodora petrova wrote:
Hello,
I am trying to use the glm_fit to correlate a continuous variable (index) with cortical thickness, when controlling for age, education, and cognition (MMSE) (all continuous variables). However, I get the following error:
ERROR: matrix is ill-conditioned or badly scaled, condno = 1e+08
Possible problem with experimental design: Check for duplicate entries and/or lack of range of continuous variables within a class. If you seek help with this problem, make sure to send:
- Your command line:
mri_glmfit --y lh.index.thickness.10.mgh --fsgd index.fsgd dods--C index.mtx --surf fsaverage lh --cortex --glmdir lh.index.glmdir 2. The FSGD file (if using one) 3. And the design matrix above
Please find attached my fsgd file and the design matrix. I searched the archives and found out that a possible reason for this may be creating my file in Windows. Indeed, I created it by copy-pasting the data from an Excel spreadsheet into an empty txt file. I tried to convert it on Linux, using the command old.fsgd | sed 's/\r/\n/g' > new.fsgd, as well as making a new txt file on Linux (by copy -paste from a spreadsheet), but these did not work either. How can I solve this?
Thank you for the help!
Best, Teodora
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