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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. | |
| # Supplied repo to be used with RScript in terminal | |
| check.packages <- function(pkg){ | |
| new.pkg <- pkg[!(pkg %in% installed.packages()[, "Package"])] | |
| if (length(new.pkg)) | |
| install.packages(new.pkg, dependencies = TRUE, repos=structure(c(CRAN="http://cloud.r-project.org/"))) | |
| sapply(pkg, require, character.only = TRUE) | |
| } | |
| # Usage example | |
| # packages<-c("REDCapR", "dplyr", "lubridate") | |
| # check.packages(packages) |
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