Created
April 1, 2014 13:23
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Check if multiple R packages are installed. Install them if they are not,then load them into the R session.
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| # check.packages function: install and load multiple R packages. | |
| # Check to see if packages are installed. Install them if they are not, then load them into the R session. | |
| check.packages <- function(pkg){ | |
| new.pkg <- pkg[!(pkg %in% installed.packages()[, "Package"])] | |
| if (length(new.pkg)) | |
| install.packages(new.pkg, dependencies = TRUE) | |
| sapply(pkg, require, character.only = TRUE) | |
| } | |
| # Usage example | |
| packages<-c("ggplot2", "afex", "ez", "Hmisc", "pander", "plyr") | |
| check.packages(packages) |
if you add options(repos=structure(c(CRAN="http://cloud.r-project.org/"))) they won’t have to select a mirror
Something like this will also work:
#This line of code installs the pacman page if you do not have it installed - if you do, it simply loads the package
if(!require(pacman))install.packages("pacman")
pacman::p_load("dplyr", "DT", "mosaic", "MASS", "usdm", "tidyverse", "ggplot2", "PerformanceAnalytics", "caTools", "glmnet", "caret","leaps","doParallel")
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@smithdanielle, very helpful function, thank you. I was wondering if library should be used instead of require? See Yihui Xie's post on require vs library... https://yihui.name/en/2014/07/library-vs-require/