On 2020-08-18 11:02 +1200, Paul Murrell wrote:
| On 18/08/20 9:54 am, Bert Gunter wrote:
| | On Mon, Aug 17, 2020 at 2:14 PM <cpolw...@chemo.org.uk> wrote:
| | |
| | | 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))
| |
| | "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 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.
Eventhough I'm a heavy user of pdf(), I
didn't notice at first that the sigma
gets converted to two dots with the
error messages
Warning messages:
1: In title(...) :
conversion failure on 'data σ= 1' in 'mbcsToSbcs': dot substituted
for <cf>
2: In title(...) :
conversion failure on 'data σ= 1' in 'mbcsToSbcs': dot substituted
for <83>
3: In title(...) :
conversion failure on 'data σ= 1' in 'mbcsToSbcs': dot substituted
for <cf>
4: In title(...) :
conversion failure on 'data σ= 1' in 'mbcsToSbcs': dot substituted
for <83>
like if it was a Han character (most
likely three dots in that case), I just
ran with cpolwart's suggestion in
whatever is the default on the R
console, probably that Cairo thing.
png() works ofc.
V
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