Thanks, I was not getting anything when I printed the x and so thought I was 
doing  something wrong. Instead I just didn't seem to have a non-ASCII 
character.

John Kane
Kingston ON Canada


> -----Original Message-----
> From: murdoch.dun...@gmail.com
> Sent: Mon, 23 Dec 2013 15:52:32 -0500
> To: jrkrid...@inbox.com, r...@temple.edu
> Subject: Re: [R] Knitr, ggplot and consistent fonts
> 
> On 13-12-23 1:07 PM, John Kane wrote:
>> Thanks  Duncan.
>> I had the feeling I was doing something wrong but did not realise it was
>> that stupid.
>> 
>> showNonASCII('ggplot(df, aes(x = x)) + geom_histogram(aes(y =
>> ..density..)),
>>                   binwidth = 1, colour = "black", fill = "white")')
>> 
>> now runs and does what the help page seems to imply: Nothing.
>> 
>>  From the showNonASCII help page:
>> "The elements of x containing non-ASCII characters will be returned
>> invisibly."
>> 
>> One gets a result one does not see?  Does one have to explicitly capture
>> the result somehow?  I really have not the faintest idea of what the
>> example from the help page is doing.
> 
> "returned invisibly" means that the result is returned with a flag set
> so it won't automatically print.  If you want to print it, you need to
> ask.  So any of these will work to see the result:
> 
> x <- showNonASCII( .... )
> x
> 
> or
> 
> print(showNonASCII( .... ))
> 
> or even (though this is one some of us don't like, it still works...)
> 
> (showNonASCII( .... ))
> 
> Duncan Murdoch
> 
>> John Kane
>> Kingston ON Canada
>> 
>> 
>>> -----Original Message-----
>>> From: murdoch.dun...@gmail.com
>>> Sent: Mon, 23 Dec 2013 12:51:43 -0500
>>> To: jrkrid...@inbox.com, r...@temple.edu
>>> Subject: Re: [R] Knitr, ggplot and consistent fonts
>>> 
>>> On 13-12-23 12:40 PM, John Kane wrote:
>>>> Thanks Richard.  I did not realise such a function existed.
>>>> 
>>>> Assuming I am using it  correctly I do get an error though not where I
>>>> was expecting it.  Anyway the code below returns an error
>>>> 
>>>> library(tools)
>>>> showNonASCII("ggplot(df, aes(x = x)) + geom_histogram(aes(y =
>>>> ..density..)), binwidth = 1, colour = "black", fill = "white")")
>>>> 
>>>> Results
>>>> Error: unexpected symbol in:
>>>> "showNonASCII("ggplot(df, aes(x = x)) + geom_histogram(aes(y =
>>>> ..density..)), binwidth = 1, colour = "black"
>>> 
>>> You get that error because you're using double quotes around a string
>>> containing double quotes, and not escaping them.  With that string,
>>> using single quotes on the outside should be fine:
>>> 
>>>    showNonASCII('ggplot(df, aes(x = x)) + geom_histogram(aes(y =
>>> ..density..)), binwidth = 1, colour = "black", fill = "white")')
>>> 
>>> Duncan Murdoch
>>>> 
>>>> 
>>>> 
>>>> John Kane
>>>> Kingston ON Canada
>>>> 
>>>> 
>>>>> -----Original Message-----
>>>>> From: r...@temple.edu
>>>>> Sent: Mon, 23 Dec 2013 11:44:42 -0500
>>>>> To: jrkrid...@inbox.com
>>>>> Subject: Re: [R] Knitr, ggplot and consistent fonts
>>>>> 
>>>>> If the problem seems to be non-ASCII characters, then the first
>>>>> investigation
>>>>> step is to use the R functions
>>>>> 
>>>>> ?tools::showNonASCII
>>>>> ?tools::showNonASCIIfile
>>>>> 
>>>>> On Mon, Dec 23, 2013 at 11:37 AM, John Kane <jrkrid...@inbox.com>
>>>>> wrote:
>>>>>> Same result here with the same error message mentioned in my first
>>>>>> post.
>>>>>> I tried it in Texmaker which is my usual Latex editor, not that I do
>>>>>> much in Latex, and then tried it in RStudio and it is still choking.
>>>>>> 
>>>>>> Interestingly EMACS will process it and produce a pdf but it simply
>>>>>> produces.  It also provides this warning: : Latex Warning; Reference
>>>>>> 'fig:plot-figheight' undefined on page 2 on input line 14.
>>>>>> 
>>>>>> It seems to repeat the same message for each of the other figures.
>>>>>> 
>>>>>> John Kane
>>>>>> Kingston ON Canada
>>>>>> 
>>>>>> 
>>>>>>> -----Original Message-----
>>>>>>> From: dulca...@bigpond.com
>>>>>>> Sent: Mon, 23 Dec 2013 22:28:33 +1000
>>>>>>> To: daniel.haugstv...@gmail.com, r-help@r-project.org
>>>>>>> Subject: Re: [R] Knitr, ggplot and consistent fonts
>>>>>>> 
>>>>>>> Hi Dan
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> I think you still have problems with embedded characters or some
>>>>>>> problems
>>>>>>> in
>>>>>>> char code page conversion or the like.
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> Not knowing knitr but Sweave I cobbled the figures manually and ran
>>>>>>> the
>>>>>>> sweave file to produce the latex file.
>>>>>>> 
>>>>>>> Latex was consistently stopping at the \caption and \ref functions
>>>>>>> 
>>>>>>> I tried to see what was happening I added hyperref & when I copied
>>>>>>> the
>>>>>>> text
>>>>>>> to hyperref  latex bailed up
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> I tried a minimal latex file without problems
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> I put the \title etc in the preamble. Some compilers need this
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> Duncan
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> From: Daniel Haugstvedt [mailto:daniel.haugstv...@gmail.com]
>>>>>>> Sent: Monday, 23 December 2013 20:10
>>>>>>> To: Duncan Mackay
>>>>>>> Cc: John Kane; R
>>>>>>> Subject: Re: [R] Knitr, ggplot and consistent fonts
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> I am really sorry for posting a non-working example. It is running
>>>>>>> when
>>>>>>> I
>>>>>>> cut the code from my previous mail into a clean session in RStudio
>>>>>>> (OSX).
>>>>>>> However, I suspect that you are right. I did cut and paste some
>>>>>>> code
>>>>>>> from
>>>>>>> a
>>>>>>> forum yesterday which had characters that had to be replaced. I
>>>>>>> gave
>>>>>>> emacs a
>>>>>>> try, but could not find the problem there either.
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> The code below was pasted though textEdit and converted to plain
>>>>>>> text.
>>>>>>> I
>>>>>>> hope this takes care of any embedded characters.
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> \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 o font size.
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> <<plot-figHeight, echo=FALSE, fig.height=2.5, fig.cap="Density plot
>>>>>>> with
>>>>>>> no
>>>>>>> fig.width argument", results='hide', 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}
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> On Sun, Dec 22, 2013 at 11:59 PM, Duncan Mackay
>>>>>>> <dulca...@bigpond.com>
>>>>>>> wrote:
>>>>>>> 
>>>>>>> Hi Daniel
>>>>>>> I tried it in Sweave after modifying it for Sweave and a similar
>>>>>>> thing
>>>>>>> for
>>>>>>> Latex but R crashed.
>>>>>>> 
>>>>>>> I think there is an embedded character/s before the first chunk and
>>>>>>> in
>>>>>>> the
>>>>>>> first chunk.
>>>>>>> 
>>>>>>> Duncan
>>>>>>> 
>>>>>>> Duncan Mackay
>>>>>>> Department of Agronomy and Soil Science
>>>>>>> University of New England
>>>>>>> Armidale NSW 2351
>>>>>>> Email: home: mac...@northnet.com.au
>>>>>>> 
>>>>>>> 
>>>>>>> -----Original Message-----
>>>>>>> From: r-help-boun...@r-project.org
>>>>>>> [mailto:r-help-boun...@r-project.org]
>>>>>>> On
>>>>>>> Behalf Of John Kane
>>>>>>> Sent: Monday, 23 December 2013 04:19
>>>>>>> To: Daniel Haugstvedt; r-help@r-project.org
>>>>>>> Subject: Re: [R] Knitr, ggplot and consistent fonts
>>>>>>> 
>>>>>>> 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.
>>>>>>> 
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>>>>>>> 
>>>>>>> ______________________________________________
>>>>>>> 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.
>>>>>>> 
>>>>>>> 
>>>>>>> 
>>>>>>> ______________________________________________
>>>>>>> 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
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