Hi Everyone: I was having trouble getting the plot size correct when
putting a plot in an sweave document. So, I searched on the internet and I
found a clever solution where the person uses
the cat function to write latex code so he can include the cat code in the
chunk and place the plot using width and height. The solution is here:
https://stat.ethz.ch/pipermail/r-help/2009-April/195094.html.
But the solution uses a backslash before the ending quotes in the cat
statements that might be windows relevant possibly ? I'm not sure about
that part but I'm on linux and when I tried my way to mimic that solution
in the latex/sweave code below ( I think it's the same solution but without
the backslash on the closing quotes. I tried that also but got a different
error ) , Sweave doesn't like the start of the includegraphics command. The
error I get from Sweave is
#======================================================Error: chunk 9 (label =
fig3)
Error : '\i' is an unrecognized escape in character string starting
"\i"
Execution halted
:~/research/equity/projects/tree_returns/report>
#====================================================
The code is below but if anyone is interested and thinks they need the
whole file to look at the problem, I can send it. I just didn't want to
send the whole file here. Definitely the error has to do with the chunk
below for sure ( even though it says chunk 9 because there is no chunk 9
). Thanks a lot to anyone who can be bothered investigating because I've
spent pretty much the whole day on this and think it's
time to surrender !!!!!!!!!! or atleast give up for now and come back to it
with a fresher brain. Have a good night.
# THE LATEX/SWEAVE CODE
#===============================================================
cal.tree is created in a previous chunk and that's fine.
<<chunk08,label=fig3, fig=FALSE,result = tex>>wid <- 5
hei <- 5
pdf("reg_tree-fig3.pdf", width = wid, height = hei)
plot(cal.tree,uniform=TRUE,compress=TRUE,margin=0.0)
text(cal.tree, all=TRUE,fheight=1.0,fwidth=1.0)
dev.off()
cat("\begin{figure}[ht!]")
cat("\begin{center}")
cat("\includegraphics[width = ", wid, ", height = ", hei,
"]{reg_tree-fig3}")
cat("\end{center}")
cat("\caption{The resulting unpruned regression tree of the california real
estate data}")
cat("\label{FIG:figthree}")
cat("\end{figure}")
@
[[alternative HTML version deleted]]
> -----Original Message----- > From: r-help-bounces at r-project.org [mailto:r-help-bounces at r- > project.org] On Behalf Of Mark Leeds > Sent: Wednesday, February 13, 2013 2:59 PM > To: r-help at r-project.org > Subject: [R] sweave question > > Hi Everyone: I was having trouble getting the plot size correct when > putting a plot in an sweave document. So, I searched on the internet > and I > found a clever solution where the person uses > the cat function to write latex code so he can include the cat code in > the > chunk and place the plot using width and height. The solution is here: > https://stat.ethz.ch/pipermail/r-help/2009-April/195094.html. > > But the solution uses a backslash before the ending quotes in the cat > statements that might be windows relevant possibly ? I'm not sure > about > that part but I'm on linux and when I tried my way to mimic that > solution > in the latex/sweave code below ( I think it's the same solution but > without > the backslash on the closing quotes. I tried that also but got a > different > error ) , Sweave doesn't like the start of the includegraphics command. > The > error I get from Sweave is > > #======================================================> Error: chunk 9 (label = fig3) > Error : '\i' is an unrecognized escape in character string starting > "\i" > Execution halted > :~/research/equity/projects/tree_returns/report> > #====================================================> > The code is below but if anyone is interested and thinks they need the > whole file to look at the problem, I can send it. I just didn't want to > send the whole file here. Definitely the error has to do with the chunk > below for sure ( even though it says chunk 9 because there is no chunk > 9 > ). Thanks a lot to anyone who can be bothered investigating because > I've > spent pretty much the whole day on this and think it's > time to surrender !!!!!!!!!! or atleast give up for now and come back > to it > with a fresher brain. Have a good night. > > # THE LATEX/SWEAVE CODE > #===============================================================> > cal.tree is created in a previous chunk and that's fine. > > <<chunk08,label=fig3, fig=FALSE,result = tex>>> wid <- 5 > hei <- 5 > pdf("reg_tree-fig3.pdf", width = wid, height = hei) > plot(cal.tree,uniform=TRUE,compress=TRUE,margin=0.0) > text(cal.tree, all=TRUE,fheight=1.0,fwidth=1.0) > dev.off() > cat("\begin{figure}[ht!]") > cat("\begin{center}") > cat("\includegraphics[width = ", wid, ", height = ", hei, > "]{reg_tree-fig3}") > cat("\end{center}") > cat("\caption{The resulting unpruned regression tree of the california > real > estate data}") > cat("\label{FIG:figthree}") > cat("\end{figure}") > @ >Mark, I am not an sweave expert, but I think the problem is actually that you need to double all of your backslash characters that you actually want to write out as a backslash. The error message says that it doesn't recognize the escape character '\i'. Hope this is helpful, Dan Daniel J. Nordlund Washington State Department of Social and Health Services Planning, Performance, and Accountability Research and Data Analysis Division Olympia, WA 98504-5204
Other people in this thread have explained the rule of double backslashes. I just want to add one more comment: That clever solution was in 2009 when knitr has not come out, and I have used this picture several times to show how much I dislike it: http://yihui.name/en/2012/06/enjoyable-reproducible-research/ With knitr, you can easily write your big code chunk (with lots of "cats" jumping around) in a much more compact way: <<figthree, fig.pos="ht!", fig.align="center", out.width="5in", out.height="5in", fig.cap="The resulting unpruned regression tree of the California real estate data">>plot(cal.tree,uniform=TRUE,compress=TRUE,margin=0.0) text(cal.tree, all=TRUE,fheight=1.0,fwidth=1.0) @ Note the number "5" alone is not a legal LaTeX length; you should add the unit such as "5in" or "5cm", etc. This chunk in knitr will generate everything for you: - the figure environment - center the figure - add the figure position ht! - add the figure caption - add figure width and height - add the figure label fig:figthree You, as the author, only write the R code (instead of both R and LaTeX); other people, as the readers, only see the R code. Everything else should go behind the scene. Regards, Yihui -- Yihui Xie <xieyihui at gmail.com> Phone: 515-294-2465 Web: http://yihui.name Department of Statistics, Iowa State University 2215 Snedecor Hall, Ames, IA On Wed, Feb 13, 2013 at 4:59 PM, Mark Leeds <markleeds2 at gmail.com> wrote:> Hi Everyone: I was having trouble getting the plot size correct when > putting a plot in an sweave document. So, I searched on the internet and I > found a clever solution where the person uses > the cat function to write latex code so he can include the cat code in the > chunk and place the plot using width and height. The solution is here: > https://stat.ethz.ch/pipermail/r-help/2009-April/195094.html. > > But the solution uses a backslash before the ending quotes in the cat > statements that might be windows relevant possibly ? I'm not sure about > that part but I'm on linux and when I tried my way to mimic that solution > in the latex/sweave code below ( I think it's the same solution but without > the backslash on the closing quotes. I tried that also but got a different > error ) , Sweave doesn't like the start of the includegraphics command. The > error I get from Sweave is > > #======================================================> Error: chunk 9 (label = fig3) > Error : '\i' is an unrecognized escape in character string starting "\i" > Execution halted > :~/research/equity/projects/tree_returns/report> > #====================================================> > The code is below but if anyone is interested and thinks they need the > whole file to look at the problem, I can send it. I just didn't want to > send the whole file here. Definitely the error has to do with the chunk > below for sure ( even though it says chunk 9 because there is no chunk 9 > ). Thanks a lot to anyone who can be bothered investigating because I've > spent pretty much the whole day on this and think it's > time to surrender !!!!!!!!!! or atleast give up for now and come back to it > with a fresher brain. Have a good night. > > # THE LATEX/SWEAVE CODE > #===============================================================> > cal.tree is created in a previous chunk and that's fine. > > <<chunk08,label=fig3, fig=FALSE,result = tex>>> wid <- 5 > hei <- 5 > pdf("reg_tree-fig3.pdf", width = wid, height = hei) > plot(cal.tree,uniform=TRUE,compress=TRUE,margin=0.0) > text(cal.tree, all=TRUE,fheight=1.0,fwidth=1.0) > dev.off() > cat("\begin{figure}[ht!]") > cat("\begin{center}") > cat("\includegraphics[width = ", wid, ", height = ", hei, > "]{reg_tree-fig3}") > cat("\end{center}") > cat("\caption{The resulting unpruned regression tree of the california real > estate data}") > cat("\label{FIG:figthree}") > cat("\end{figure}") > @ > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at 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.