must.use.package: Do everything possible to load an R package.
In NCmisc: Miscellaneous Functions for Creating Adaptive Functions and Scripts

must.use.package

R Documentation

Do everything possible to load an R package.

Description

Like 'require()' except it will attempt to install a package if necessary. Installation of bioconductor packages is deprecated. Useful if you wish to share code with people who may not have the same libraries as you, you can include a call to this function which will simply load the library if present, or else install, then load, if they do not have it.

Usage

must.use.package(
  pcknms,
  ask = FALSE,
  reload = FALSE,
  avail = FALSE,
  quietly = FALSE
)

Arguments

`pcknms`	list of packages to load/install
`ask`	whether to get the user's permission to install a required package, or just go ahead and do it
`reload`	indicates to reload the package even if loaded
`avail`	see whether pcknms are in the list of available CRAN packages
`quietly`	passed to library/require, display installation text or not

Value

nothing, simply loads the packages specified if possible

Author(s)

Nicholas Cooper njcooper@gmx.co.uk

Examples

# not run : run if you are ok to install/already have these packages
# must.use.package(c("MASS","nlme","lme4"),ask=FALSE)
# search() # show packages have loaded, then detach them again:
# sapply(paste("package",c("MASS","nlme","lme4"),sep=":"),detach,character.only=TRUE)

NCmisc documentation built on Oct. 17, 2022, 5:09 p.m.