Re: [R] expression + paste + arguments + ...

[Uwe Ligges]

[EMAIL PROTECTED] wrote:
dear R wizards:  I would like to write a function that roughly places 
the equivalent of the following latex text into the current plot:

  \newcommand{ \placesigma }[4]{ \put(\#1,\#2){ \sigma_{A , #3} = #4 }
???
You are "just" defining a new LaTeX command ... nothing will be printed 
in LaTeX.

Instead of using \put, you can specify coordinates as usual in R using 
text(), title() or mtext().
Instead of "\sigma_{A , #3} = #4", you can use

  substitute(sigma[v3] == v4, list(v3 = paste("A,",v3), v4 = v4))
which leads to, e.g.
  plot(1:10)
  v3 <- 99
  v4 <- 55
  text(4, 1, label = substitute(sigma[v3] == v4,
 list(v3 = paste("A,",v3), v4 = v4)))
See also ?plotmath and the R Help Desk Column in R News 2 (3).
Uwe Ligges

I cannot figure out how to do this.  I know I have to use a function 
that uses expressions in a text() invoke.  But passing arguments and 
nesting strings and expressions has so far not worked for me.  I hope 
this is an obvious question---if not, please just tell me and I can give 
up.  help appreciated.

sincerely,
/iaw
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Re: [R] expression + paste + arguments + ...

[Spencer Graves]

 I don't know latex, but have you looked at "?plotmath", including 
'demo(plotmath)', the examples in the documentation, and an R site 
search suggested in the posting guide 
(http://www.R-project.org/posting-guide.html)?  What you want is 
probably fairly easy, once you parse the "plotmath" documentation.  hope 
this helps.  spencer graves

[EMAIL PROTECTED] wrote:
dear R wizards:  I would like to write a function that roughly places 
the equivalent of the following latex text into the current plot:

  \newcommand{ \placesigma }[4]{ \put(\#1,\#2){ \sigma_{A , #3} = #4 }
I cannot figure out how to do this.  I know I have to use a function 
that uses expressions in a text() invoke.  But passing arguments and 
nesting strings and expressions has so far not worked for me.  I hope 
this is an obvious question---if not, please just tell me and I can 
give up.  help appreciated.

sincerely,
/iaw
__
[EMAIL PROTECTED] mailing list
https://www.stat.math.ethz.ch/mailman/listinfo/r-help
PLEASE do read the posting guide! 
http://www.R-project.org/posting-guide.html
__
[EMAIL PROTECTED] mailing list
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PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html