R上で、rworldmapをロードした際に発生するエラーを解決したい。

Question

現在、Rを初めて使用して2週間ほど経つ大学院生です。(プログラミング等、全くの初心者です)

①本日、R上にrworldmapパッケージをインストールし、rworldmapをロードするため以下のコードを打ち込みました。

library(rworldmap)

②その際、次のようなエラーが発生し、rworldmapをロードすることができません。

Loading required package: sp

Error: package or namespace load failed for ‘rworldmap’ in loadNamespace(i, c(lib.loc, .libPaths()), versionCheck = vI[[i]]):
there is no package called ‘spam’

③インストール時は次のような反応を得ました。

install.packages("rworldmap", dependencies = TRUE)

also installing the dependency ‘rgdal’

There is a binary version available but the source version is later:
binary source needs_compilation
rgdal 1.4-6 1.4-7 TRUE

Do you want to install from sources the package which needs compilation? (Yes/no/cancel) Yes
trying URL 'https://cran.rstudio.com/bin/macosx/el-capitan/contrib/3.6/rworldmap_1.3-6.tgz'
Content type 'application/x-gzip' length 2927933 bytes (2.8 MB)

downloaded 2.8 MB

The downloaded binary packages are in
/var/folders/qd/bwv1wzx11rs1dnmrw48276840000gn/T//RtmpSOCbkl/downloaded_packages
installing the source package ‘rgdal’

trying URL 'https://cran.rstudio.com/src/contrib/rgdal_1.4-7.tar.gz'
Content type 'application/x-gzip' length 1699394 bytes (1.6 MB)

downloaded 1.6 MB

• installing source package ‘rgdal’ ...

** package ‘rgdal’ successfully unpacked and MD5 sums checked
** using staged installation
configure: R_HOME: /Library/Frameworks/R.framework/Resources
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
configure: CC:
configure: CXX:
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
xcrun: error: invalid active developer path (/Library/Developer/CommandLineTools), missing xcrun at: /Library/Developer/CommandLineTools/usr/bin/xcrun
configure: C++11 support not available
configure: rgdal: 1.4-7
checking for /usr/bin/svnversion... no
configure: svn revision: 845
checking for gdal-config... no
no
configure: error: gdal-config not found or not executable.
ERROR: configuration failed for package ‘rgdal’

• removing ‘/Library/Frameworks/R.framework/Versions/3.6/Resources/library/rgdal’

Warning in install.packages :
installation of package ‘rgdal’ had non-zero exit status

The downloaded source packages are in
‘/private/var/folders/qd/bwv1wzx11rs1dnmrw48276840000gn/T/RtmpSOCbkl/downloaded_packages’

この際、どのように問題を解決すればよろしいのでしょうか。ご存知の方、よろしくお願いいたします。

なお、現在は次の環境で使用しています。
Mac OS Catalina 10.15.1
R R 3.6.1
R Studio Version 1.2.5001

よろしくお願いいたします。

Answer 1

パッケージがないと言われているので、それをインストールする必要があるでしょうね。install.packageした際に何かメッセージが出ていたんじゃないですか？

Comments

[H.K.Z.]

インストール時に出たメッセージを追加してみました。
ERROR: configuration failed for package ‘rgdal’というメッセージが問題部分でしょうか？
素人な物でご迷惑をおかけしますが、よろしくお願いいたします。

[KojiDoi]

rworldmapはrgdalに依存していて、rgdalのインストールするにはxcrunなるものがちゃんと動いていなければならないことがエラーメッセージから読み取れます。
こういうときにはエラーメッセージを丸ごとググるのです。
ここではまず、xcrun: error: invalid active developer path
対処法が見つかるので、根っこの方から順に処理してみてください。