R: Which Elements are Finite?

This help topic is for R version 0.60. For the current version of R, try https://stat.ethz.ch/R-manual/R-patched/library/base/html/is.finite.html

is.finite {base}

R Documentation

Which Elements are Finite?

is.finite returns a vector of the same length as x the jth element of which is TRUE if the jth element of x is finite.

At present, IEEE arithmetic is not supported and this is simply the same as !is.na(x).

is.finite(x)