On 26.04.2013 13:58, Jonathan Jansson wrote:
Hi! I am trying to make a stepwise regression in the multivariate case, using
Wilks' Lambda test.
I've tried this:
greedy.wilks(cbind(Y1,Y2) ~ . , data=my.data )
But it only returns:
Error in model.frame.default(formula = X[, j] ~ grouping,
Hi! I am trying to make a stepwise regression in the multivariate case, using
Wilks' Lambda test.
I've tried this:
greedy.wilks(cbind(Y1,Y2) ~ . , data=my.data )
But it only returns:
Error in model.frame.default(formula = X[, j] ~ grouping, drop.unused.levels =
TRUE) :
variable lengths
commented, minimal, self-contained, reproducible code.
-
Frank Harrell
Department of Biostatistics, Vanderbilt University
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