swh:1:snp:81eadaa089e8253d8469bcef66aa332632c6c669
Tip revision: e970b8e92676e0d1f2c84b116f0bad93b03b89c6 authored by Hans W. Borchers on 15 December 2019, 21:30:02 UTC
version 2.2.9
version 2.2.9
Tip revision: e970b8e
inv.R
##
## i n v . R matrix inverse
##
inv <- function(a) {
if (length(a) == 0) return(matrix(0, nrow=0, ncol=0))
if ((!is.numeric(a) && !is.complex(a)) || !is.matrix(a))
stop("Argument 'a' must be a numeric or complex matrix.")
if (nrow(a) != ncol(a))
stop("Matrix 'a' must be square.")
e <- try(b <- solve(a), silent=TRUE)
if(inherits(e, "try-error")) {
warning("Matrix appears to be singular.")
b <- rep(Inf, length(a))
dim(b) <- dim(a)
}
return(b)
}