Re: [R] R demos

From: Douglas Bates <dmbates_at_gmail.com>
Date: Sat 25 Jun 2005 - 01:24:34 EST

On 6/24/05, Jim Brennan <jfbrennan@rogers.com> wrote:
> I have noticed that some data sets seem not to be available to me when I am
> running some of the examples or demos since I have changed versions. For
> example:
> demo(persp)
>
>
> demo(persp)
> ---- ~~~~~
>
> Type <Return> to start :
>
> R>if (dev.cur() <= 1) get(getOption("device"))()
>
> R>is.dev.interactive <- .Device %in% c("X11", "GTK",
> "gnome", "quartz", "windows", "JavaGD")
>
> R>op <- par(ask = is.dev.interactive)
>
> R>x <- seq(-10, 10, length = 50)
>
> R>y <- x
>
> R>rotsinc <- function(x, y) {
> sinc <- function(x) {
> y <- sin(x)/x
> y[is.na(y)] <- 1
> y
> }
> 10 * sinc(sqrt(x^2 + y^2))
> }
>
> R>sinc.exp <- expression(z == Sinc(sqrt(x^2 + y^2)))
>
> R>z <- outer(x, y, rotsinc)
>
> R>par(bg = "white")
>
> R>persp(x, y, z, theta = 30, phi = 30, expand = 0.5,
> col = "lightblue")
> Waiting to confirm page change...
>
> R>title(sub = ".")
>
> R>title(main = sinc.exp)
>
> R>persp(x, y, z, theta = 30, phi = 30, expand = 0.5,
> col = "lightblue", ltheta = 120, shade = 0.75, ticktype = "detailed",
> xlab = "X", ylab = "Y", zlab = "Z")
> Waiting to confirm page change...
>
> R>title(sub = ".")
>
> R>title(main = sinc.exp)
>
> R>z <- 2 * volcano
> Error in eval.with.vis(expr, envir, enclos) :
> Object "volcano" not found
>
> So most of this demo works but volcano is not found.
> Any ideas what may be going wrong.
> Also for example
> R>?reshape
> R>summary(Indometh)
> Error in summary(Indometh) : Object "Indometh" not found

For some reason you do not have the datasets package attached.

> find(Indometh)

[1] "package:datasets"
> find(volcano)

[1] "package:datasets"



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https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html Received on Sat Jun 25 01:29:59 2005

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