[R] Plotting in LaTeX with ggplot2 in R and using tikzdevice

[Jeff Newmiller]

I would think knitr package would be useful in this endeavor. And possibly RStudio....

If that doesn't do it,  someone here may have a better hint, but solving this kind of question can require studying both the input (R code) and output (tikz/LaTeX code). While the R code belongs here, details of the rest get OT pretty quick. 
-- 
Sent from my phone. Please excuse my brevity.

On August 3, 2016 2:20:17 PM PDT, Ecstasia Tisiphoni <ecstasia1 at gmail.com> wrote:
>Hello,
>not totally sure if this is a R or a LaTeX topic...
>
>I am a total newbie to R and LaTeX, and trying to write my masters
>thesis right now... I tried to get this answered via
>https://cran.r-project.org/web/packages/tikzDevice/vignettes/tikzDevice.pdf
> ...but I failed... :(
>
>I am creating plots in R via ggplot2, and converting them to TeX
>format via tikzDevice.
>
>Now many of my plots have a legend on the right, which differs in size
>(depending of course on the legend title and text).
>
>If I now convert my Rplot using tikz() it only scales the size for the
>whole image it creates.
>
>What I want is: the rectangular plot itself to always be the same size
>for all my plots (no matter how big/small the legend and the axis
>numbers are)...
>
>My Rscript with some test Data:
>
>library(ggplot2)
>library(scales)
>require(grid)
>library(tikzDevice)
>
>
>#setting time zone
>options(tz="Europe/Berlin")
>
>tikz(file = "my_output_file.tex", standAlone=F,width = 6, height = 3)
>
>
>cars['dt'] = seq(Sys.Date(),Sys.Date()-980,-20)
>plot <- ggplot(cars,aes(y=speed,x=dist,color=as.integer(dt)))+
>               geom_point(size=2,alpha=0.7)+
>               xlab("distance")+
>               ylab("speed")+
>               scale_color_gradientn("dt",
>                                     colours=rainbow(6)
>                                     )+
>
>#textsize
>theme_bw()+
>theme(legend.position="right",
>      legend.key.height=unit(2,"lines"),
>      legend.title=element_text(size=rel(0.8)),
>      legend.text=element_text(size=rel(0.8)),
>      axis.text.y=element_text(angle=90,
>                               hjust=0.5),
>      axis.title=element_text(size=rel(0.8))
> )
>
>print(plot)
>
>dev.off()
>
>
>If I change now the legend text to a slightly longer text, the output
>of course has a completely different plot-size.
>Is there a way to maintain the plot size?
>
>I hope somebody can help me, or lead me to the information I need...
>
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