svMisc (version 0.9-46)

r: A very silent and multipackage require() function

Description

This function loads one or several R packages as silently as possible and it returns TRUE only if all packages are loaded successfully. If at least one loading fails, a short message is printed.

Usage

r(...)

Arguments

...

the name of one or several R packages to load (character strings)

Value

• TRUE if all packages are loaded correctly, FALSE otherwise. This function is designed to concisely and quitely indicate package requirements in GUI menu or other GUI actions.

See Also

require

Examples

# This should work...
if (r("tools", "methods")) cat("Fine!
")
# ... but this not (notice there is no error or warning!)
if (r("tools", "badname")) cat("Fine!
")