[Rd] can't plot a line

[Gabor Grothendieck]

That's because your "line" is a point.  Both components of the y vector
are equal.  Check your parens.

On 1/23/07, Spencer Graves <spencer.graves at pdf.com> wrote:
> Consider the following:
>
>      plot(0, 0, xlim=c(-10, 10), ylim=c(-50, 50))
>      lines(c(0,0), (2*c(-pi, pi))^2)
>
>      I see no line in this plot.
>
> R version 2.4.1 (2006-12-18)
> i386-pc-mingw32
>
> locale:
> LC_COLLATE=English_United States.1252;LC_CTYPE=English_United
> States.1252;LC_MONETARY=English_United
> States.1252;LC_NUMERIC=C;LC_TIME=English_United States.1252
>
> attached base packages:
> [1] "stats"     "graphics"  "grDevices" "utils"     "datasets"  "methods"
> [7] "base"
>
>      My work around is the following:
>
>      pi2.2 <- (2*pi)^2
>      lines(c(0, 0), c(-pi2.2, pi2.2))
>
>      Why won't "lines(c(0,0), (2*c(-pi, pi))^2)" work for me?
>      Thanks,
>      Spencer Graves
>
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