cpoiw@rt m@iii@g oii chemo@org@uk
2020-Aug-17 21:14 UTC
[R] Plot math symbol with string and number
On 2020-08-17 03:13, Rasmus Liland wrote:> On Sun, Aug 16, 2020 at 3:18 PM Bert wrote: > | On Sun, Aug 16, 2020, 14:53 John wrote: > | | > | | I would like to make plots with > | | titles for different data sets and > | | different parameters. The first > | | title doesn't show sigma as a math > | | symbol, while the second one > | | doesn't contain the s value as a > | | numeric value > | | > | | s <- 1 > | | y <- rnorm(100) > | | plot(y, main=paste("data", "sigma=", s)) > | | plot(y, main=expression(paste("data", sigma,"=", s))) > | > | ?plotmath > > Dear John, read ?plotmath, it is good, I > was not aware of its existence; then > backquote s like so: > >Plotmath seems to be the right way to do it. But without reading plotmath I'd have gone with this: plot(y, main=paste("data", "\u03C3=", s))
On 2020-08-17 22:14 +0100, cpolwart at chemo.org.uk wrote:
| On 2020-08-17 03:13, Rasmus Liland wrote:
| | On Sun, Aug 16, 2020 at 3:18 PM Bert wrote:
| | |
| | | ?plotmath
| |
| | Dear John, read ?plotmath, it is
| | good, I was not aware of its
| | existence; then backquote s like
| | so:
|
| Plotmath seems to be the right way to
| do it. But without reading plotmath
| I'd have gone with this:
|
| plot(y, main=paste("data", "\u03C3=", s))
Good; for me copying the sigma unicode
character into that line works too:
plot(y, main=paste("data?=", s))
How curious
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"Plotmath seems to be the right way to do it. " Not sure I agree with that. Paul Murrell put together plotmath around 2000 prior to the widescale development and adoption of the unicode standard (corrections/modifications welcome!). So at the time, there really was no other way to handle this for most OS'es. With UTF8 now being generally supported for Unicode, plotmath constructions may not be needed for simple symbol labeling, as here. Of course for more complex symbolism (fractions, integrals, ...) it will be. ?plotmath talks about this and has links to further issues and options, btw. In other words, unicode may indeed be better than my suggestion of plotmath here. I would welcome comments from others who are more knowledgeable about this than I am. Bert On Mon, Aug 17, 2020 at 2:14 PM <cpolwart at chemo.org.uk> wrote:> On 2020-08-17 03:13, Rasmus Liland wrote: > > On Sun, Aug 16, 2020 at 3:18 PM Bert wrote: > > | On Sun, Aug 16, 2020, 14:53 John wrote: > > | | > > | | I would like to make plots with > > | | titles for different data sets and > > | | different parameters. The first > > | | title doesn't show sigma as a math > > | | symbol, while the second one > > | | doesn't contain the s value as a > > | | numeric value > > | | > > | | s <- 1 > > | | y <- rnorm(100) > > | | plot(y, main=paste("data", "sigma=", s)) > > | | plot(y, main=expression(paste("data", sigma,"=", s))) > > | > > | ?plotmath > > > > Dear John, read ?plotmath, it is good, I > > was not aware of its existence; then > > backquote s like so: > > > > > > Plotmath seems to be the right way to do it. But without reading > plotmath I'd have gone with this: > > plot(y, main=paste("data", "\u03C3=", s)) > > > >[[alternative HTML version deleted]]
I think that comment is fair *on graphics devices that can handle unicode*. So that is true for Cairo-based graphics devices, but not for the pdf() or postscript() devices, for example. Paul On 18/08/20 9:54 am, Bert Gunter wrote:> "Plotmath seems to be the right way to do it." > > Not sure I agree with that. Paul Murrell put together plotmath around 2000 > prior to the widescale development and adoption of the unicode standard > (corrections/modifications welcome!). So at the time, there really was no > other way to handle this for most OS'es. With UTF8 now being generally > supported for Unicode, plotmath constructions may not be needed for simple > symbol labeling, as here. Of course for more complex symbolism (fractions, > integrals, ...) it will be. ?plotmath talks about this and has links to > further issues and options, btw. > > In other words, unicode may indeed be better than my suggestion of plotmath > here. > > I would welcome comments from others who are more knowledgeable about this > than I am. > > Bert > > On Mon, Aug 17, 2020 at 2:14 PM <cpolwart at chemo.org.uk> wrote: > >> On 2020-08-17 03:13, Rasmus Liland wrote: >>> On Sun, Aug 16, 2020 at 3:18 PM Bert wrote: >>> | On Sun, Aug 16, 2020, 14:53 John wrote: >>> | | >>> | | I would like to make plots with >>> | | titles for different data sets and >>> | | different parameters. The first >>> | | title doesn't show sigma as a math >>> | | symbol, while the second one >>> | | doesn't contain the s value as a >>> | | numeric value >>> | | >>> | | s <- 1 >>> | | y <- rnorm(100) >>> | | plot(y, main=paste("data", "sigma=", s)) >>> | | plot(y, main=expression(paste("data", sigma,"=", s))) >>> | >>> | ?plotmath >>> >>> Dear John, read ?plotmath, it is good, I >>> was not aware of its existence; then >>> backquote s like so: >>> >>> >> >> Plotmath seems to be the right way to do it. But without reading >> plotmath I'd have gone with this: >> >> plot(y, main=paste("data", "\u03C3=", s)) >> >> >> >> > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > https://apc01.safelinks.protection.outlook.com/?url=https%3A%2F%2Fstat.ethz.ch%2Fmailman%2Flistinfo%2Fr-help&data=02%7C01%7C%7C3624d54caaf64787734308d842f83677%7Cd1b36e950d5042e9958fb63fa906beaa%7C0%7C0%7C637332981200092221&sdata=U7ywrEh7Z3XV84pkxXfzUJTYU8BEZ995Np5xo3%2Fbn9g%3D&reserved=0 > PLEASE do read the posting guide https://apc01.safelinks.protection.outlook.com/?url=http%3A%2F%2Fwww.r-project.org%2Fposting-guide.html&data=02%7C01%7C%7C3624d54caaf64787734308d842f83677%7Cd1b36e950d5042e9958fb63fa906beaa%7C0%7C0%7C637332981200092221&sdata=7VBd7dQFox%2BCEUEKgJZk6TU6cwmDS7tnAcGok9UH1WQ%3D&reserved=0 > and provide commented, minimal, self-contained, reproducible code. >-- Dr Paul Murrell Department of Statistics The University of Auckland Private Bag 92019 Auckland New Zealand 64 9 3737599 x85392 paul at stat.auckland.ac.nz http://www.stat.auckland.ac.nz/~paul/