is.installed

Check whether packages are installed

Usage

is.installed(packages)

Arguments

packages

package names

Value

logical vector

See also

Other pkg-utils: CRANpkg(), Githubpkg(), get_dependencies(), get_fun_from_pkg(), mypkg(), packageTitle(), pload()

Author

Guangchuang Yu

Examples

is.installed(c("dplyr", "ggplot2"))
#>   dplyr ggplot2 
#>   FALSE   FALSE