[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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