[R] Question about parse and expression

[Charles C. Berry]

On Wed, 6 Jun 2007, Nitin Jain wrote:

> Dear R-users,
>
> In the following example, I would like to see my ylabel as: "beta[3] * 
> x[3] + epsilon" (where beta and epsilon are replaced by their 
> mathematical symbols).
>
> Please advise.

 	?plotmath
 	?bquote
 	example(plotmath)

>
> Thanks.
>
> Nitin
>
>
> i <- 3
>
> ee <- expression(beta[i] * x[i] + epsilon)
>
> xyplot(1:10~ 11:20,
>       ylab = parse(text=ee)
>       )
>
>
>
>
>
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Charles C. Berry                        (858) 534-2098
                                          Dept of Family/Preventive Medicine
E mailto:cberry at tajo.ucsd.edu	         UC San Diego
http://biostat.ucsd.edu/~cberry/         La Jolla, San Diego 92093-0901