Dear all,
I have 2 matrices, one is a 8x3 matrix, called X; the other matrix is a 3x3
indicator matrix with the diagonal element as 0 or 1. when a variable is
included in the model, the corresponding diagonal element is 1, otherwise, it
is 0. Let A be a set of matrices that contain the possible indicator matrix.
e.g.,
A= [A1, A2, A3],
where A1= [1,0,0;0,0,0,0,0,0],
A2 =[1,0,0;0,1,0,0,0,0],
A3 =[1,0,0;0,0,0,0,1,0]
In order to derive the new X matries depending on the indicator matrices, I use
for loops to multiply both X and A as following
p<-3
for ( i in 1:p){
XX<- X%*%A[i]
}
However, it only shows the result when i=p. How can I derive the results which
include all possible value of XX[i], i=1,..,p, rather than just i=p
thanks for any help
Ya-Hsiu
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