037-graphics-hyperlink.Rnw

%% courtesy of Jonathan Kennel
%% library(knitr); knit('links.Rnw')
\documentclass{report}
\usepackage{tikz,hyperref}

\begin{document}
<<setup, include=FALSE>>=
## important to add \usepackage{hyperref} to metric packages!
options(tikzMetricPackages = c("\\usepackage[utf8]{inputenc}",
   "\\usepackage[T1]{fontenc}", "\\usetikzlibrary{calc}", "\\usepackage{hyperref}"))

opts_chunk$set(external = FALSE, cache = TRUE, fig.width = 5)
@

Create link texts in the data:

<<pltPreparation, tidy.opts=list(width.cutoff=50)>>=
  library(lattice)
  data(iris)
  iris$hyperlink    <- paste("\\hyperlink{",iris$Species,"}{",iris$Species,"}", sep = '')
  iris$hypertarget <- paste("\\hypertarget{",iris$Species,"}{",iris$Species,"}", sep = '')
@

Draw these texts in plots (you can click on the labels):

<<pltFacet, dev = 'tikz'>>=
  xyplot(Sepal.Length~Sepal.Width|hyperlink, data = iris)
@

<<pltInd, dev = 'tikz'>>=
  xyplot(Sepal.Length~Sepal.Width|hypertarget, data = iris, layout= c(1,1))
@

Note the option external has to be FALSE here, otherwise LaTeX will not be able
to find the link target in the document.

\end{document}