Excuse my brevity, but take a look at ?plotmath It has tons of tips for making pretty labels On Tue, Nov 30, 2021, 14:05 Rich Shepard <rshepard at appl-ecosys.com> wrote:> I want to present the temperature on the Y-axis label as 'Water Temperature > (oC)' with the degree symbol as a superscript. > > My web search found a couple of methods; one put the entire example string > in the axis label, the other is close, but still incorrect. > > Source example: > #define expression with superscript > x_expression <- expression(x^3 ~ variable ~ label) > # The example axis label is: > 'X3 variable label' (with the 3 as a superscript) > > My use: > # Set degree symbol as superscript in plot's y axis: > y_expression <- expression(^o ~ C) > > R's error message: > Error in source("../scripts/all_temp_plots.r") : > ../scripts/all_temp_plots.r:10:28: unexpected '^' > 9: # Set degree symbol as superscript in plot's y axis: > 10: y_expression <- expression(^ > ^ > > What is the proper way to display a degree symbol in a plot's axis label? > > Rich > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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. >[[alternative HTML version deleted]]
On Tue, 30 Nov 2021, Andrew Simmons wrote:> Excuse my brevity, but take a look at ?plotmath > It has tons of tips for making pretty labelsThanks, Andrew. I will. Rich
True, but unnecessary with UTF-8 encodings of unicode (subject to some
caveats, though):
plot(1:5, runif(5),xlab = "Temp (?F)", ylab = "result")
should work fine, where the ? ("degree") symbol was inserted by the
symbol insertion facility on my Mac. Windows has something similar.
See the comments in the plotmath documentation just before the
examples for more details on this, along with some caveats about the
need for a suitable display/plot device.
More laboriously, but perhaps more informatively, one can look up
"unicode code point for degree symbol" to find that it is decimal 176.
Then R's intToUtf8() function converts this to the UTF-8 encoding that
**should** display as a "degree" symbol, subject to the above
referenced caveats.
Hence:> intToUtf8(176)
[1] "?" ##degree character
## So, for example, you can do:> degrF <-paste0(intToUtf8(176),"F")
> degrF
[1] "?F" ("degrees F")
> plot(1:5, runif(5),xlab = paste0("Temp (", degrF,")"),
ylab = "result")
As Andrew said, you can use plotmath to do this, too; it just isn't
needed for simple insertion of "standard" symbols.
NOTE: As I am far from an expert on all of this, I would appreciate
clarification or correction of any errors or misstatements in the
above.
Bert Gunter
On Tue, Nov 30, 2021 at 11:34 AM Andrew Simmons <akwsimmo at gmail.com>
wrote:>
> Excuse my brevity, but take a look at ?plotmath
>
> It has tons of tips for making pretty labels
>
> On Tue, Nov 30, 2021, 14:05 Rich Shepard <rshepard at
appl-ecosys.com> wrote:
>
> > I want to present the temperature on the Y-axis label as 'Water
Temperature
> > (oC)' with the degree symbol as a superscript.
> >
> > My web search found a couple of methods; one put the entire example
string
> > in the axis label, the other is close, but still incorrect.
> >
> > Source example:
> > #define expression with superscript
> > x_expression <- expression(x^3 ~ variable ~ label)
> > # The example axis label is:
> > 'X3 variable label' (with the 3 as a superscript)
> >
> > My use:
> > # Set degree symbol as superscript in plot's y axis:
> > y_expression <- expression(^o ~ C)
> >
> > R's error message:
> > Error in source("../scripts/all_temp_plots.r") :
> > ../scripts/all_temp_plots.r:10:28: unexpected '^'
> > 9: # Set degree symbol as superscript in plot's y axis:
> > 10: y_expression <- expression(^
> > ^
> >
> > What is the proper way to display a degree symbol in a plot's axis
label?
> >
> > Rich
> >
> > ______________________________________________
> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> > 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.
> >
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> 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.
Using the degree character seems perfectly legit to me. The reason I suggest looking at plotmath is that I think plotmath is easier to read (that is, if you're escaping your characters with \u), and because for anything more complicated like set notation, big sums, integrals, you'll need to get used to plotmath to make your labels. Either way, nice suggestion, both work perfectly well for this situation On Tue, Nov 30, 2021, 16:24 Bert Gunter <bgunter.4567 at gmail.com> wrote:> True, but unnecessary with UTF-8 encodings of unicode (subject to some > caveats, though): > > plot(1:5, runif(5),xlab = "Temp (?F)", ylab = "result") > > should work fine, where the ? ("degree") symbol was inserted by the > symbol insertion facility on my Mac. Windows has something similar. > See the comments in the plotmath documentation just before the > examples for more details on this, along with some caveats about the > need for a suitable display/plot device. > > More laboriously, but perhaps more informatively, one can look up > "unicode code point for degree symbol" to find that it is decimal 176. > Then R's intToUtf8() function converts this to the UTF-8 encoding that > **should** display as a "degree" symbol, subject to the above > referenced caveats. > Hence: > > intToUtf8(176) > [1] "?" ##degree character > > ## So, for example, you can do: > > degrF <-paste0(intToUtf8(176),"F") > > degrF > [1] "?F" ("degrees F") > > > plot(1:5, runif(5),xlab = paste0("Temp (", degrF,")"), ylab = "result") > > As Andrew said, you can use plotmath to do this, too; it just isn't > needed for simple insertion of "standard" symbols. > > NOTE: As I am far from an expert on all of this, I would appreciate > clarification or correction of any errors or misstatements in the > above. > > Bert Gunter > > > On Tue, Nov 30, 2021 at 11:34 AM Andrew Simmons <akwsimmo at gmail.com> > wrote: > > > > Excuse my brevity, but take a look at ?plotmath > > > > It has tons of tips for making pretty labels > > > > On Tue, Nov 30, 2021, 14:05 Rich Shepard <rshepard at appl-ecosys.com> > wrote: > > > > > I want to present the temperature on the Y-axis label as 'Water > Temperature > > > (oC)' with the degree symbol as a superscript. > > > > > > My web search found a couple of methods; one put the entire example > string > > > in the axis label, the other is close, but still incorrect. > > > > > > Source example: > > > #define expression with superscript > > > x_expression <- expression(x^3 ~ variable ~ label) > > > # The example axis label is: > > > 'X3 variable label' (with the 3 as a superscript) > > > > > > My use: > > > # Set degree symbol as superscript in plot's y axis: > > > y_expression <- expression(^o ~ C) > > > > > > R's error message: > > > Error in source("../scripts/all_temp_plots.r") : > > > ../scripts/all_temp_plots.r:10:28: unexpected '^' > > > 9: # Set degree symbol as superscript in plot's y axis: > > > 10: y_expression <- expression(^ > > > ^ > > > > > > What is the proper way to display a degree symbol in a plot's axis > label? > > > > > > Rich > > > > > > ______________________________________________ > > > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > > > 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. > > > > > > > [[alternative HTML version deleted]] > > > > ______________________________________________ > > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > > 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. >[[alternative HTML version deleted]]