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My example is:

\documentclass[12pt]{article} \begin{document} <<eg, dev='tikz', size='normalsize', echo=FALSE, message=FALSE, warning=FALSE, sanitize=TRUE>>= require(ggplot2) p1 <- ggplot() + geom_segment(aes(x = 1, y = 1, xend = 2, yend = 2), linetype= 2) p1 @ \end{document}

Which generates a dashed line (when using other graphics devices). When using tikz, there is a thin black line sitting underneath the dashed line. Any ideas as to how to get rid of this?

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  • Might be related to github.com/yihui/tikzDevice/issues/63 You may ask if Kirill has got any progress on that issue if it is the same one. Commented Nov 2, 2014 at 2:45
  • It is indeed the same problem. I also get the correct output looking in my browser. In Sumatra, I see the extra line. Commented Nov 2, 2014 at 7:44

1 Answer 1

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I have worked out a patch solution for this. Use geom_path to replace the misbehaving geoms. e.g.

 p1 + geom_path(data=data.frame(x=c(1, 2), y=c(1, 2)), aes(x=x, y=y), linetype=2)
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