[VoxBo] correlation between regressors
Dongbo Hu
dongbo at mail.med.upenn.edu
Mon Aug 20 12:01:11 EDT 2007
On Mon, 20 Aug 2007, Daniel Y Kimberg wrote:
>_> And how does the information provided by checking "collinearity with
>_> interest" differ from that provided in the .info file of a GLM?
>_
>_In the info file you're supposed to get the equivalent of
>_"collinearity with all," not just vars of interest. Eyeballing a few,
>_the numbers are still a little off. This might be because gdw does
>_the calculation with the covariates before downsampling them to the
>_resolution of your data. Dongbo, can you verify that?
>_
Actually, gdw calculates colinearity after downsampling covariates to
original covariates. Maybe there is some rounding error in one of the
calculations?
Dongbo
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