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pdcompsymm
2006 Jul 24
1
User defined covariate structure.
I am trying to use nlme but instead of using one of the ?identity? variance or
covariance matrixes such as compsymm or ar1. Instead I want the covariance
matrix to be represented in the following manor. Is it possible to define my
own covariance matrix?
I have search and found papers saying I can define my own covariance matrixes
and own correlation structures. Said use corstruct but not sure how to
implement...