Introduction
Packages build on base R. This document explains how to inspect installed packages and their functionality. Related Docs: Installing packages
Remarks
The Comprehensive R Archive Network (CRAN) is the primary package repository.
View package information
To retrieve information about dplyr package and its functions' descriptions:
help(package = "dplyr")
No need to load the package first.
View package's built-in data sets
To see built-in data sets from package dplyr
data(package = "dplyr")
No need to load the package first.
List a package's exported functions
To get the list of functions within package dplyr, we first must load the package:
library(dplyr)
ls("package:dplyr")
View Package Version
Conditions: package should be at least installed. If not loaded in the current session, not a problem.
## Checking package version which was installed at past or
## installed currently but not loaded in the current session
packageVersion("seqinr")
# [1] ‘3.3.3’
packageVersion("RWeka")
# [1] ‘0.4.29’
View Loaded packages in Current Session
To check the list of loaded packages
search()
OR
(.packages())
