How to view installed r packages in R language

stay R In language , How to view installed R package , Loaded packages , You can use the following commands .

1. View installed packages

installed.packages()

It will come out , All installed R Package details , Include package name , route , edition , priority , Suggestions, etc

Extract the installed package name ：

as.data.frame(installed.packages())$Package

2. View the loaded R package

The parentheses here cannot be omitted

(.packages())

You can see , It is loaded by default 7 A basic package .

If you don't want to load , Can be removed from memory （ This is not delete ）, use detach：

Be careful , Double quotation marks here must have ,packages: There has to be

detach("package:stats")

We see ,stats Has been removed .

Want to load back , use library()

library(stats)

You can see ,stats In memory again

3. load and unload R package

install R package , If it's in CRAN in , Direct use install.packages(),

install.packages("ggplot2")

Load it , See if it works ：

> library(ggplot2)
RStudio Community is a great place to get help:
https://community.rstudio.com/c/tidyverse

Delete R package , use remove.packages()

remove.packages("ggplot2")

4. to update R package

to update R package , use update.packages()

 update.packages("ggplot2")

5. see R Package version

load R package , And then use ：sessionInfor()

You can see ,ggplot2 The version is ：3.3.6