[R] font question on pdf device

[David Winsemius]

On Oct 8, 2010, at 8:44 AM, Kari Ruohonen wrote:

> Hi,
> I wonder if this is something on my machine locally or R in general.
>
> When I do the following:
>> plot(c(0,1),c(0,1),main=expression(paste(symbol("D"),"D",sep="")))
>
> I get a plot with a title having uppercase delta followed by "D".  
> But in
> the following
>
>> pdf(file="deltaTest.pdf")
>> plot(c(0,1),c(0,1),main=expression(paste(symbol("D"),"D",sep="")))
>> dev.off()

The more predictable way to get "GreekDelta"-D would be:

 > pdf(file="deltaTest.pdf")
 > plot(c(0,1),c(0,1),main=expression(Delta*D))
 > dev.off()

I.e., using the symbol font cap-delta the way is is supposed to be  
used, and not misusing the paste() platmath function, which is both  
unnecessary here and misleading as to standard plotmath syntax.

>
> the uppercase delta looks like O with overstrike slash, i.e. Ø.
>
> Other greek alphabets, such as Gamma, seem to work fine for pdf as  
> well.
>
> My sessioninfo for this is
>
>> sessionInfo()
> R version 2.11.1 (2010-05-31)
> x86_64-pc-linux-gnu
>
> locale:
> [1] LC_CTYPE=en_GB.UTF-8       LC_NUMERIC=C
> [3] LC_TIME=en_GB.UTF-8        LC_COLLATE=en_GB.UTF-8
> [5] LC_MONETARY=C              LC_MESSAGES=en_GB.UTF-8
> [7] LC_PAPER=en_GB.UTF-8       LC_NAME=C
> [9] LC_ADDRESS=C               LC_TELEPHONE=C
> [11] LC_MEASUREMENT=en_GB.UTF-8 LC_IDENTIFICATION=C
>
> attached base packages:
> [1] stats     graphics  grDevices utils     datasets  methods
> base
>
> Many thanks,
> Kari
>
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David Winsemius, MD
West Hartford, CT