R language-View load pack, dismount Load Pack and install package and unload package

In the R language, it is often necessary to see which package loads or looks at a number of similar functions, to see exactly which package is working, and to run the comparison analysis after loading and unloading.

1. View Loaded Packages

> (. Packages ())

Note that the outer brackets and the preceding points cannot be saved.

2. Remove the loaded Package

such as removing the Rmysql package

>detach ("Package:rmysql")

Note that it is dismounted, not unloaded, which means that the package is not completely removed from the R run environment, except that the package is not loaded for use.

It is useful to validate function dependencies when the package uses function conflicts.

3. Installation package

>install.packages ("Rjson")

Download the package to install the "Rjson" entry.

4. Unload Loaded Packages

To completely remove an installed package:

Remove. Packages (C ("Pkg1", "Pkg2"), lib = file. Path ("path", "to", "library"))

Report:

1. View Installed Packages

>installed.packages () [, C (' package ', ' Version ', ' LibPath ')]

where C (' package ', ' Version ', ' LibPath ') represents the display of packet name, version, library path information, and if none [, C (' ' Package ', ' Version ', ' LibPath ')] parameter, all information is displayed.

2. View the functions provided by a package

> Help (package= ' TSA ')

The packages parameter is the package name of the package that you want to view.

3. See which package a function belongs to

>help (name of function)

See which package belongs in the Open Web page.

R language-View load pack, dismount Load Pack and install package and unload package