(This article was first published on

**cameron.bracken.bz » R**, and kindly contributed to R-bloggers)This is one way to check for the version of PGF that is installed in an automated way. First create a tex file with the following contents:

\documentclass{article}

\usepackage{tikz}

\batchmode

\makeatletter

\typeout{PGFVersion=\pgfversion}

\@@end

\usepackage{tikz}

\batchmode

\makeatletter

\typeout{PGFVersion=\pgfversion}

\@@end

Say you named it `test-pgf-version.tex`

. Then:

pdflatex test-pgf-version.tex

cat test-pgf-verson.log | grep PGFVersion | sed ‘s/PGFVersion=//’

cat test-pgf-verson.log | grep PGFVersion | sed ‘s/PGFVersion=//’

should display the version number. I happen to need to do this from `R`

so using similar logic:

logFile <- ‘test–pgf–version.log‘

logContents <- readLines( logFile )

match <- logContents[ grep(‘PGFVersion=‘, logContents) ]

version <- gsub(‘[=A–Za–z–]‘,”,match)

print(version)

logContents <- readLines( logFile )

match <- logContents[ grep(‘PGFVersion=‘, logContents) ]

version <- gsub(‘[=A–Za–z–]‘,”,match)

print(version)

which accomplishes the same task as the second line above.

To

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