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Gavin Simpson

2004-Nov-04 12:20 UTC

[R] sub- and superscript in plot labels

Dear List,

I need to add a subscript and a superscript to some of the ions in the 
labels on some plots.

I have got to here but now I'm stuck:

plot(1:10, xlab = expression(paste("nm SO"[4], " ", mu,
"eq cm"^{-2}, "
yr"^{-1})))

Which gives almost  what I require. No matter what I tried, however, I 
could not get bot a sub script *and* a superscript attached to the SO in 
the label.

In LaTeX I would just do $SO_4^{2-}$ but taking that to R produces a 
syntax error:

plot(1:10, xlab = expression(paste("nm SO"[4]^{2-}, " ", mu,
"eq
cm"^{-2}, " yr"^{-1})))

Strangely, I can do this:

plot(1:10, xlab = expression(paste("nm SO"[4]^2, " ", mu,
"eq cm"^{-2},
" yr"^{-1})))

With almost the desired effect (except I need to add two characters to 
the superscript).

Can any one offer a solution?

Many thanks

Gavin
-- 
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
Gavin Simpson                     [T] +44 (0)20 7679 5522
ENSIS Research Fellow             [F] +44 (0)20 7679 7565
ENSIS Ltd. & ECRC                 [E] gavin.simpson at ucl.ac.uk
UCL Department of Geography       [W] http://www.ucl.ac.uk/~ucfagls/cv/
26 Bedford Way                    [W] http://www.ucl.ac.uk/~ucfagls/
London.  WC1H 0AP.
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%

Prof Brian Ripley

2004-Nov-04 12:42 UTC

head link

[R] sub- and superscript in plot labels

On Thu, 4 Nov 2004, Gavin Simpson wrote:
> Dear List,
> 
> I need to add a subscript and a superscript to some of the ions in the 
> labels on some plots.
> 
> I have got to here but now I'm stuck:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4], " ", mu,
"eq cm"^{-2}, "
> yr"^{-1})))
> 
> Which gives almost  what I require. No matter what I tried, however, I 
> could not get bot a sub script *and* a superscript attached to the SO in 
> the label.
> 
> In LaTeX I would just do $SO_4^{2-}$ but taking that to R produces a 
> syntax error:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4]^{2-}, "
", mu, "eq
> cm"^{-2}, " yr"^{-1})))
The problem is 2-.  That's not an R expression.  Using "2-" might
give
what you want, but it will use a hyphen rather than a minus. Otherwise

plot(1:10, xlab = expression(paste("nm SO"[4]^{2-phantom()})))

will give a minus.

-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595

Gavin Simpson

2004-Nov-04 12:43 UTC

head link

[R] sub- and superscript in plot labels

Gavin Simpson wrote:> Dear List,
> 
> I need to add a subscript and a superscript to some of the ions in the 
> labels on some plots.
> 
> I have got to here but now I'm stuck:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4], " ", mu,
"eq cm"^{-2}, "
> yr"^{-1})))
> 
> Which gives almost  what I require. No matter what I tried, however, I 
> could not get bot a sub script *and* a superscript attached to the SO in 
> the label.
> 
> In LaTeX I would just do $SO_4^{2-}$ but taking that to R produces a 
> syntax error:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4]^{2-}, "
", mu, "eq
> cm"^{-2}, " yr"^{-1})))
> 
> Strangely, I can do this:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4]^2, " ",
mu, "eq cm"^{-2},
> " yr"^{-1})))
> 
> With almost the desired effect (except I need to add two characters to 
> the superscript).
> 
> Can any one offer a solution?
> 
> Many thanks
> 
> Gavin
With further playing around, it would appear that you can sort of 
achieve what I was looking for by changing the ordering of the 
characters in the braces on the superscript:

plot(1:10, xlab = expression(paste("nm SO"[4]^{-2}, " ", mu,
"eq
cm"^{-2}, " yr"^{-1})))

which works as required.

Is this intentional behaviour? My original question still stands, 
however, is there a way to have {2-} appear as the superscript?

The forgotten version info (sorry!):

 > version
          _
platform i686-pc-linux-gnu
arch     i686
os       linux-gnu
system   i686, linux-gnu
status   Patched
major    2
minor    0.0
year     2004
month    10
day      25
language R

Running on Fedora Core 2.

Many thanks

Gavin
-- 
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%
Gavin Simpson                     [T] +44 (0)20 7679 5522
ENSIS Research Fellow             [F] +44 (0)20 7679 7565
ENSIS Ltd. & ECRC                 [E] gavin.simpson at ucl.ac.uk
UCL Department of Geography       [W] http://www.ucl.ac.uk/~ucfagls/cv/
26 Bedford Way                    [W] http://www.ucl.ac.uk/~ucfagls/
London.  WC1H 0AP.
%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%

BXC (Bendix Carstensen)

2004-Nov-04 13:02 UTC

head link

[R] sub- and superscript in plot labels

try:

plot(1:10, xlab = substitute( expression(paste("nm SO"[4]^{2-x},
" ",
                              mu, "eq cm"^{-2}, "
yr"^{-1})),
                              list(x="") ) )

I have no understanding of why it works, formula fidgeting usually
requires use of subtitute().

Btw. I started out trying:
plot(1:10, xlab = substitute( expression(paste("nm SO"[4]^x, "
",
                              mu, "eq cm"^{-2}, "
yr"^{-1})),
                              list(x="2-") ) )
but that gives a hyphen and not a minus trailing the superscript "2".

Bendix Carstensen
> -----Original Message-----
> From: r-help-bounces at stat.math.ethz.ch 
> [mailto:r-help-bounces at stat.math.ethz.ch] On Behalf Of Gavin Simpson
> Sent: Thursday, November 04, 2004 1:20 PM
> To: R-help at stat.math.ethz.ch
> Subject: [R] sub- and superscript in plot labels
> 
> 
> Dear List,
> 
> I need to add a subscript and a superscript to some of the 
> ions in the 
> labels on some plots.
> 
> I have got to here but now I'm stuck:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4], " ", mu,
"eq
> cm"^{-2}, " 
> yr"^{-1})))
> 
> Which gives almost  what I require. No matter what I tried, 
> however, I 
> could not get bot a sub script *and* a superscript attached 
> to the SO in 
> the label.
> 
> In LaTeX I would just do $SO_4^{2-}$ but taking that to R produces a 
> syntax error:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4]^{2-}, "
", mu, "eq
> cm"^{-2}, " yr"^{-1})))
> 
> Strangely, I can do this:
> 
> plot(1:10, xlab = expression(paste("nm SO"[4]^2, " ",
mu, "eq
> cm"^{-2}, 
> " yr"^{-1})))
> 
> With almost the desired effect (except I need to add two 
> characters to 
> the superscript).
> 
> Can any one offer a solution?
> 
> Many thanks
> 
> Gavin
> -- 
> %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~
> %~%~%~%~%
> Gavin Simpson                     [T] +44 (0)20 7679 5522
> ENSIS Research Fellow             [F] +44 (0)20 7679 7565
> ENSIS Ltd. & ECRC                 [E] gavin.simpson at ucl.ac.uk
> UCL Department of Geography       [W] 
> http://www.ucl.ac.uk/~ucfagls/cv/
> 26 Bedford Way              
>       [W] http://www.ucl.ac.uk/~ucfagls/
> London.  WC1H 0AP. 
> %~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~%~
> %~%~%~%~%
> 
> ______________________________________________
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> PLEASE do read 
> the posting guide! http://www.R-project.org/posting-guide.html
>

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