Re: Repeated contrast for COXREG

Posted by Kirill Orlov on Jan 04, 2022; 5:35pm
URL: http://spssx-discussion.165.s1.nabble.com/Repeated-contrast-for-COXREG-tp5740927p5740930.html

Bruce,
The first matrix is contrast coefficient (L) matrix.
The second matrix is the coding (C) matrix, i.e. values of the design matrix.

They are related as the ginv() of each other (but not so for all types of contrasts).
I discuss this in the description of my macro "Categorical into contrast" !KO_CATCONT which produces predictor variables for various contrast types. You could download from my page https://www.spsstools.net/en/macros/KO-spssmacros/