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I have a problem to install package 'swirl' on my Rstudio. I tried several cran in China and it cannot connect to server every time. Does anyone know any possible reason? *ps:since the stackoverflow does not allow me to post more than one URL link so I cut off a 'h' of from 'http'

 install.packages("swirl")

Warning in install.packages :

URL 'http://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES.rds': status was 'Couldn't connect to server' Warning in install.packages : URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES.gz': status was 'Couldn't connect to server' Warning in install.packages : URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES': status was 'Couldn't connect to server' Warning in install.packages : unable to access index for repository ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib: cannot open URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES' Warning in install.packages : URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES.rds': status was 'Couldn't connect to server' Warning in install.packages : URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES.gz': status was 'Couldn't connect to server' Warning in install.packages : URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES': status was 'Couldn't connect to server' Warning in install.packages : unable to access index for repository ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib: cannot open URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/src/contrib/PACKAGES' Warning in install.packages : package 'swirl' is not available (for R version 3.4.0) Warning in install.packages : URL 'ttp://mirrors.tuna.tsinghua.edu.cn/CRAN/bin/macosx/el-capitan/contrib/3.4/PACKAGES.rds': status was 'Couldn't connect to server'

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Eddie.Wu
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1 Answers1

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Try:

install.packages("swirl", repos="http://cran.rstudio.com/", dependencies=TRUE)
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  • If you could add some information about why the proposed solution answers the question that will make the contribution more valuable for the site... – Cindy Meister Mar 08 '19 at 18:10