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Install and load multiple R packages at once
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| # ipak 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. | |
| ipak <- 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 | |
| packages <- c("ggplot2", "plyr", "reshape2", "RColorBrewer", "scales", "grid") | |
| ipak(packages) |
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Very useful function. Thanks for sharing this!