[R] ylab/ expression/ superscript to a bracket

[Peter Dalgaard BSA]

"S.McClatchie" <s.mcclatchie at niwa.cri.nz> writes:

>   My problem comes in applying a superscripted number to a bracket (see
>   the )^{-3} below:
> 
>   ylab=expression(paste('mean SV dB [', m^{2},' (160 m',)^{-3},']'))
> 
>   This gives an error (due to what is interpreted as an extra bracket).
>   However, superscript requires a character to superscript to, so I can
>   either use a dot (which is confusing in the label) 
> 
>    ylab=expression(paste('mean SV dB [', m^{2},' (160 m)',.^{-3},']'))
> 
>   or use another kind of bracket. Unfortunately the label needs two kinds
>   of brackets. Also using a brace, }^{-3} doesn't help for obvious
>   reasons.
> 
>   Any hints? Help will be appreciated.

?plotmath will tell you about phantom() and group()...

I'd go for 

plot(0, ylab=expression('mean SV dB  ' * 
	                group("[", m^{2} * ("160 m")^{-3}, "]")))

-- 
   O__  ---- Peter Dalgaard             Blegdamsvej 3  
  c/ /'_ --- Dept. of Biostatistics     2200 Cph. N   
 (*) \(*) -- University of Copenhagen   Denmark      Ph: (+45) 35327918
~~~~~~~~~~ - (p.dalgaard at biostat.ku.dk)             FAX: (+45) 35327907
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