I use the following code to generate a matrix of factors. I'm
wondering if there is a way to make it more general so that I can have
any number of factors (not necessarily 5).
a=3
b=4
c=5
d=6
e=7
A=1:a
B=1:b
C=1:c
D=1:d
E=1:e
X=matrix(nr=a*b*c*d*e,nc=5)
for(i_a in 1:a-1) {
for(i_b in 1:b-1) {
for(i_c in 1:c-1) {
for(i_d in 1:d-1) {
for(i_e in 1:e-1) {
X[(((i_a * b + i_b) * c + i_c) * d + i_d) * e + i_e + 1, ] =
c(i_a+1, i_b+1, i_c+1, i_d+1, i_e+1)
}
}
}
}
}
print(X)
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