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 differ (found for 'grouping') 
What can be wrong here? I have checked and all variables in my.data is of the same length.
//Jonathan
 		 	   		  
	[[alternative HTML version deleted]]

