autoload                package:base                R Documentation

On-demand Loading of Packages

Description:

     `autoload' creates a promise-to-evaluate `autoloader' and stores
     it with name `name' in `.AutoloadEnv' environment.  When R
     attempts to evaluate `name', `autoloader' is run, the package is
     loaded and `name' is re-evaluated in the new package's
     environment.  The result is that R behaves as if `file' was loaded
     but it does not occupy memory.

Usage:

     autoload(name, package,...)
     autoloader(name, package,...)
     .AutoloadEnv

Arguments:

    name: string giving the name of an object

 package: string giving the name of a package containing the object

     ...: other arguments to `library'

Value:

     This function is invoked for its side-effect.

See Also:

     `delay', `library'

Examples:

     autoload("line","eda")
     search()
     ls("Autoloads")
     all(ls("Autoloads") == ls(envir = .AutoloadEnv))
     data(cars)
     plot(cars)
     z<-line(cars)
     abline(coef(z))
     search()
     detach("package:eda")
     search()
     z<-line(cars)
     search()

