Hello! I will repeat my question :what is there in a numeric(0)? In a function, I have several matrices with dimensions 288x1, also matrices with dimensions 0x1 (numeric(0)). But I really do not know in which matrix there are elements or not. So, these matrices that do not contain anything, if I am saying this correctly, I would like to make them matrices with the same dimensions as the first ones but with NA elements and the ones with elements to remain as they are. For this reason, I thought to use the ifelse command. But I have problems determining the arguments of this ifelse... I tried to use: A1 <- ifelse(nrow(A)==0,matrix(rep(NA,288),288,1),A)
If A is a matrix with elements, then I get a A1 matrix with replicated 288 times its first element, but I want the initial A matrix. If A is a matrix with no elements (numeric(0)) then I get only 1 NA. So, how can I test if there are elements in my matrix and if there are to return itself the matrix and if there are not to get a matrix 288x1 with NAs? Thank you for your time! Ismini ______________________________________________ [email protected] mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.
