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Update R Packages on Windows After Updating R
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| # 1. Before you upgrade, build a temp file with all of your old packages. | |
| tmp <- installed.packages() | |
| installedpkgs <- as.vector(tmp[is.na(tmp[,"Priority"]), 1]) | |
| save(installedpkgs, file="installed_old.rda") | |
| # 2. Install the new version of R and let it do its thing. | |
| # 3. Once you’ve got the new version up and running, reload the saved packages and re-install them from CRAN. | |
| load("installed_old.rda") | |
| tmp <- installed.packages() | |
| installedpkgs.new <- as.vector(tmp[is.na(tmp[,"Priority"]), 1]) | |
| missing <- setdiff(installedpkgs, installedpkgs.new) | |
| install.packages(missing) | |
| update.packages() |
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https://www.r-bloggers.com/upgrade-r-without-losing-your-packages/