升级至R 3.5.0（Windows 10）后无法安装dplyr的问题求助
Hey there, let’s work through this dplyr installation problem you’re having after upgrading R to 3.5.0 on Windows 10. Those errors and warnings point to incomplete downloads and file access issues—here’s how to resolve them step by step:
Step 1: Clean Up Damaged Files & Retry with a Stable Mirror
The "downloaded length mismatch" warning means the dplyr zip file didn’t download fully, probably due to a flaky network connection. Let’s start fresh:
- First, delete any corrupted partial files from R’s temporary directory:
file.remove(list.files(tempdir(), pattern = "dplyr", full.names = TRUE)) - Then reinstall using a reliable CRAN mirror and request the pre-compiled Windows binary package (this avoids messy source compilation):
install.packages("dplyr", repos = "https://cran.rstudio.com/", type = "binary")
Step 2: Run R/RStudio as Administrator
Windows’ default permissions might block R from unzipping or accessing installed files. Try this quick fix:
- Close any open R/RStudio windows.
- Right-click the R or RStudio icon and select "Run as administrator".
- Once launched, retry the
install.packages("dplyr")command.
Step 3: Manual Download & Local Installation
If automatic downloads still fail, bypass the CRAN downloader entirely:
- Go to CRAN and grab the Windows binary zip file for dplyr that’s compatible with R 3.5.x.
- Save the zip file to a easy-to-find folder (like
C:/Downloads/). - In R, run this command (replace the file path with your actual download location):
install.packages("C:/Downloads/dplyr_1.0.7.zip", repos = NULL, type = "binary")
Step 4: Verify Rtools Installation (Optional)
If you accidentally trigger source compilation (unlikely with binary installs), R 3.5.x requires Rtools35. Make sure it’s installed and added to your system PATH. Only use this step if the above methods don’t work.
Start with Steps 1 and 2—they fix most download/unzip issues like this. If you still hit snags, feel free to follow up!
内容的提问来源于stack exchange，提问作者KMK
