R包列在CRAN上但不在可用包中

Question

I want to install a package that is listed in https://cran.r-project.org/web/packages/available_packages_by_name.html as available in CRAN, but when I check in R the install packages menu or the available.packages() command, I can't see the package there.

Do I need to do something different to install those packages? Why aren't those packages available?

The packages I'm interested on are WikipediR ( https://cran.r-project.org/web/packages/WikipediR/index.html ), WikidataR and WikipediaR.

If it matters, I'm using R 2.15.0 in Windows XP.

Answer 1

See the documentation for ?available.packages ...

By default, the return value includes only packages whose version and OS requirements are met by the running version of R, and only gives information on the latest versions of packages.

In other words... your R 2.15 is likely too old for the package you are looking to download.

Answer 2

您可以尝试下载软件包源手动将软件包添加到通常位于“win-library / 2.15 /”之类的软件包库中，但是像Cory所说的那样，旧版本的R可能不支持软件包构建。

Answer 3

The advice given so far is a bit incomplete although I do agree you need to update your R version if you want to use these packages. Looks like they don't need compilation so you might have been able to either install from a local copy or drop R code in, but critically they depend on httr which requires R 3.0.0 or above. They were released only relatively recently, so there will be no Windows binaries from back in 2012. (Your copy of R is from 30-Mar-2012.) Look in the DESCRIPTION file which is presented in a nice web format at the CRAN/package listing:

https://cran.r-project.org/web/packages/WikidataR/index.html
    Imports:    httr, jsonlite, WikipediR
   Suggests:    testthat, knitr, pageviews

# only one version of these two
https://cran.r-project.org/src/contrib/Archive/WikidataR/WikidataR_1.0.0.tar.gz
https://cran.r-project.org/src/contrib/Archive/WikipediaR/WikipediaR_1.0.tar.gz
# pick one of these
https://cran.r-project.org/src/contrib/Archive/WikipediR/