我在項目中使用renv package時無法安裝sf package

Question

我在Rstudio開始了一個新項目，選擇了使用renv的選項。 我做的第一件事是輸入命令 install.packages('sf') 和 R 返回以下消息。 如何進行？

> install.packages('sf')
Error: package 'sf' is not available
In addition: Warning messages:
1: could not retrieve available packages for url "https://cran.rstudio.com/src/contrib" 
2: could not retrieve available packages for url "https://cran.rstudio.com/bin/windows/contrib/4.1" 
3: curl: (35) schannel: next InitializeSecurityContext failed: Unknown error (0x80092012) - A função de revogação não pôde verificar a revogação do certificado. 
4: package 'sf' is not available 
5: failed to retrieve 'https://rstudio-buildtools.s3.amazonaws.com/renv/mran/packages.rds' [error code 35]

Answer 1

正如@KevinUshey 指出的那樣，我可以通過以下方式下載它：

Sys.setenv(RENV_DOWNLOAD_FILE_METHOD = "libcurl")