on.exit {base}R Documentation

Function Exit Code

Description

on.exit records the expression given as its argument as needing to be executed when the current function exits (either naturally or as the result of an error). This is useful for resetting graphical parameters or performing other cleanup actions.

If no expression is provided, i.e., the call is on.exit(), then the current on.exit code is removed.

Usage

on.exit(expr, add = FALSE)

Arguments

expr an expression to be executed.
add if TRUE, add expr to be executed after any previously set expressions.

References

Becker, R. A., Chambers, J. M. and Wilks, A. R. (1988) The New S Language. Wadsworth & Brooks/Cole.

See Also

sys.on.exit to see the current expression.

Examples

opar <- par(mai = c(1,1,1,1))
on.exit(par(opar))


[Package base version 2.1.0 Index]