it should be smth like that:
apply(sapply(seq(1, 204, by=12), seq, length=4), 2, function(x)
{
M <- dta[,x]
z <- sapply(M, nlevels) # if dta is a dataframe
if (sum(z==1)<3) cor(as.matrix(M[,z!=0]), use="comp", method="spear")
else NA
})
Jacques VESLOT
INRA - Biostatistique & Processus Sp
Dear everyone,
I am new in R and I've got difficulties in realizing the following
tasks:
-I have variables (factors) with different numbers of levels, either 1,
2 or 3.
-I have a matrix containing these 204 factors and I have to correlate
them by groups of 4 variables.
-I have to delete the facto
