warnings {base} | R Documentation |
warnings
prints the toplevel variable last.warning
in a pleasing form.
warnings(...)
ow <- options("warn") for(w in -1:1) { options(warn = w); cat("\n warn =",w,"\n") for(i in 1:3) { cat(i,"..\n"); m <- matrix(1:7, 3,4) } } warnings() options(ow) # reset