Re: [R] math symbols and text with mtext()

From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>
Date: Mon 31 Jul 2006 - 19:40:20 EST

Juan Lewinger <lewinger@usc.edu> writes:

> Dear R users,
>
> Two questions:
>
> 1) Is there a way to simplify the mtext() line below ?
>
> beta=c(1,-1)
> m=5
> plot(1)
> mtext( bquote(paste( beta == .(paste( "(", paste(beta, collapse=", "), ")" )) )), outer=TRUE,line=-3)
>

The outer paste() is superfluous, but apart from that: Not really. You're specifying a nonstandard formatting of beta, "(1, -1)" so you also need to give all details. If you can live with a slightly different format, try

mtext( bquote(beta == .(deparse(beta) ) ), outer=TRUE,line=-3)

and in fact,

mtext(bquote( beta == .(substring(deparse(beta), 2)) ), outer=TRUE,line=-3)

will strip off the leading "c" and give you what you want, but only slightly less cryptically.

> 2) How do I get the embedded carriage return "\n" below to work, i.e for the text that follows it to appear on the next line?
>
> beta=c(1,-1)
> m=5

> plot(1)
> mtext( bquote(paste( beta == .(paste( "(", paste(beta, collapse=", "), ") " )),
> "\n Expected # of true positives = ", .(m))), outer=TRUE, line=-3)
>
> Thanks in advance!
>
> Juan Pablo Lewinger, Ph.D.
> Department of Preventive Medicine
> Keck School of Medicine
> University of Southern California
>
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
>

-- 
   O__  ---- Peter Dalgaard             ุster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)                  FAX: (+45) 35327907

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Received on Mon Jul 31 19:45:35 2006

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