processing-scripts > Fisher Transformation
Jun 8, 2011  01:06 PM | Ali Bayram
Fisher Transformation
Dear Experts,

In the 6_singlesubjectRSFC.sh file,
****
## 3. Z-transform correlations       
echo Z-transforming correlations for seed ${seed_name}
3dcalc -a ${RSFC_dir}/${seed_name}_corr.nii.gz -expr 'log((a+1)/(a-1))/2' -prefix ${RSFC_dir}/${seed_name}_Z.nii.gz
****
This step applies Fisher Transformation, and if I'm not wrong the definition of this transformation is log((1+a)/(1-a))/2, why (a-1) used instead?

Thank you very much.



Regards,

Ali Bayram

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TitleAuthorDate
Fisher Transformation
Ali Bayram Jun 8, 2011
Xi-Nian Zuo Jun 8, 2011
Ali Bayram Jun 9, 2011