在devtools :: install_github（“ rstudio / rmarkdown”）上安装失败

Question

I use R 3.4.3, And I need to install devtools::install_github("rstudio/rmarkdown"). But the following installation error comes up.

Downloading GitHub repo rstudio/rmarkdown@master
from URL https://api.github.com/repos/rstudio/rmarkdown/zipball/master
Installation failed: zip file 'C:\Users\Buster\AppData\Local\Temp\RtmpWyl4FP\file3bc6c571eec.zip' cannot be opened
Warning messages:
1: GitHub repo contains submodules, may not function as expected! 
2: In utils::unzip(src, exdir = target) :
  error 1 in extracting from zip file

How can I install this?

Answer 1

this has been resolved. I used devtools::install_url(" http://cran.r-project.org/src/contrib/rmarkdown_1.9.tar.gz ")

Answer 2

As explained in the README for rmarkdown:

If you are working within RStudio then you can simply install the current release of RStudio (both the rmarkdown package and pandoc are included).

If you want to use the rmarkdown package outside of RStudio then you can install the package from CRAN as follows:

install.packages("rmarkdown")

This is a much more concise way of doing:

devtools::install_url("http://cran.r-project.org/src/contrib/rmarkdown_1.9.tar.gz")