I am forwarding to r-help just in case anyone else where wondering or have the same problem running the example.
Cheers D ---------- Forwarded message ---------- From: Daniel Haugstvedt <daniel.haugstv...@gmail.com> Date: Sun, Dec 22, 2013 at 11:54 PM Subject: Re: [R] Knitr, ggplot and consistent fonts To: John Kane <jrkrid...@inbox.com> Hi John, Thank you for taking the time to look at this. The error is because of the "_" in geom_histogram. "_" is reserved in latex for subscripts and requires the statement to be in math mode which is why latex wants $ before and after $ ($ is used for inline math mode in latex). The question now becomes, why is the word geom_histogram in the .tex file. It should have been compiled to a plot. There are two reasons I can think of: 1) Could it be that the R code fails and that the error is printed to the .tex document? 2) Does knitr sends the R code without editing it. Do you have some sort of default global parameter which is interfering. e.g. results='asis'? If you want to get this to work you could try the option results='hide' in the <<plot-figHeight>>= chunk. That is the only solution I can think of. I have been given me some pointers and a link ( https://github.com/wch/ggplot2/wiki/New-theme-system) which should help me get this sorted out. Replacing theme_classic() with theme_classic(10) got me almost all the way. Cheers from Norway Daniel Haugstvedt By the way John, I gave LyX a quick try. It seems I have been missing out on some progress. For me it is not a big problem, but my students could really benefit from a simpler alternative to latex. On Sun, Dec 22, 2013 at 7:19 PM, John Kane <jrkrid...@inbox.com> wrote: > Hi Daniel, > > For some reason I cannot get your example to work. The problem is in the > code chunk but I have no idea what is happening. The code is running > perfectly in R, itself but LaTeX seems to be choking when it hits the first > ggplot statement, that is the one in <<plot-figHeight>>= > > The message I am getting is: "Missing $ inserted <inserted text> $ > ggplot(df, aes(x=x)) = geom_" and my knowledge of LateX is not enough to > figure out the problem. > > I tried stripping out most of the LaTeX specific verbiage in the code > chunk and running the code in LyX which I use rather than plain vanilla > LaTeX and I still cannot get it to work. It is almost as if there is some > hidden character in the in that piece of code since I can duplicate the > code myself and I even pasted in most of the geom_histogram code into my > code chunk and it runs. > > John Kane > Kingston ON Canada > > > > -----Original Message----- > > From: daniel.haugstv...@gmail.com > > Sent: Sun, 22 Dec 2013 12:42:50 +0100 > > To: r-help@r-project.org > > Subject: [R] Knitr, ggplot and consistent fonts > > > > Dear R-help > > > > I am using Knitr and ggplot to draft an article and have now started to > > improve on the layout and graphics. So far I have not been able to > > maintain > > the same font size for labels in all my figures. > > > > My goal is to be able to change the width of the figures while > > maintaining > > the same font. This works for the height parameter (example not > > included). > > > > In the true document I also use tikz, but the problem can be reproduced > > without it. > > > > I know the question is very specific, but my understanding is that this > > combination of packages is common. (They are really great. Keep up the > > good work.) There has to be others facing the same problem and someone > > must have found a nice solution. > > > > Additional attempts from my side which failed are not included in the > > example. I have tested the Google results i could find without any luck. > > > > Cheers > > Daniel > > > > PS. I know the example plots could have been smaller, but they just > > became > > too ugly for me > > > > > > \documentclass{article} > > \begin{document} > > > > <<setup, include=FALSE, cache=FALSE>>= > > library(knitr) > > library(ggplot2) > > @ > > > > \title{Knitr and ggplot2} > > \author{Daniel Haugstvedt} > > > > \maketitle > > > > There are four plots in this article. Figure \ref{fig:plot-figHeight} > > uses > > the argument fig.height=2.5 while Figures \ref{fig:plot-figWidth} > > used both fig.height=2.5 and fig.width=3. The later option makes the font > > too big. > > > > An alternative approach is used in Figures \ref{fig:plot-figOutWidthBig} > > and > > \ref{fig:plot-figOutWidthSmall}. There the argument out.width is set to > > 12 and 8 cm respectively. This stops the problem of excessively large > > fonts > > for figures with smaller width, but there is still no consistency > > across plots in terms of font size. > > > > <<plot-figHeight, echo=FALSE, fig.height=2.5, fig.cap="Density plot with > > no > > fig.width argument", fig.pos='ht'>>= > > df = data.frame(x = rnorm(100), y = 1:100) > > ggplot(df, aes(x = x)) + > > geom_histogram(aes(y = ..density..), > > binwidth = 1, colour = "black", fill = "white") + > > xlab("Improvement, %") + > > ylab("Density") + > > theme_classic() > > @ > > > > <<plot-figWidth, echo=FALSE, fig.height=2.5, fig.width = 3, > > fig.cap="Density plot with fig.width=3", fig.pos='ht'>>= > > ggplot(df, aes(x = x)) + > > geom_histogram(aes(y = ..density..), > > binwidth = 1, colour = "black", fill = "white") + > > xlab("Improvement, %") + > > ylab("Density") + > > theme_classic() > > @ > > > > <<plot-figOutWidthBig, echo=FALSE, fig.height=2.5, out.width = "12cm", > > fig.cap="Density plot with out.width=12cm", fig.pos='ht'>>= > > ggplot(df, aes(x = x)) + > > geom_histogram(aes(y = ..density..), > > binwidth = 1, colour = "black", fill = "white") + > > xlab("Improvement, %") + > > ylab("Density") + > > theme_classic() > > @ > > > > <<plot-figOutWidthSmall, echo=FALSE, fig.height=2.5, out.width = "8cm", > > fig.cap="Density plot with out.width=8cm", fig.pos='ht'>>= > > ggplot(df, aes(x = x)) + > > geom_histogram(aes(y = ..density..), > > binwidth = 1, colour = "black", fill = "white") + > > xlab("Improvement, %") + > > ylab("Density") + > > theme_classic() > > @ > > > > \end{document} > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help@r-project.org mailing list > > https://stat.ethz.ch/mailman/listinfo/r-help > > PLEASE do read the posting guide > > http://www.R-project.org/posting-guide.html > > and provide commented, minimal, self-contained, reproducible code. > > ____________________________________________________________ > GET FREE SMILEYS FOR YOUR IM & EMAIL - Learn more at > http://www.inbox.com/smileys > Works with AIM®, MSN® Messenger, Yahoo!® Messenger, ICQ®, Google Talk and > most webmails > > > [[alternative HTML version deleted]]
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