pdftools

pdftoolsパッケージでPDFファイルのテキストを読み込む

 インストール

install.packages('pdftools')
library(pdftools)

で良いはずだが、インストール時にエラーが出る。

Package poppler-cpp was not found in the pkg-config search path.
Perhaps you should add the directory containing `poppler-cpp.pc'
to the PKG_CONFIG_PATH environment variable
No package 'poppler-cpp' found
Using PKG_CFLAGS=-I/usr/include/poppler/cpp -I/usr/include/poppler
Using PKG_LIBS=-lpoppler-cpp

素直に、エラーメッセージの指示に従う。↓

------------------------- ANTICONF ERROR ---------------------------
Configuration failed because poppler-cpp was not found. Try installing:
* deb: libpoppler-cpp-dev (Debian, Ubuntu, etc)
* On Ubuntu 16.04 or 18.04 use this PPA:
   sudo add-apt-repository -y ppa:opencpu/poppler
   sudo apt-get update
   sudo sudo apt-get install -y libpoppler-cpp-dev