# Example(persp) fails in 0.63.4 and 0.64 (PR#152)

**ripley@stats.ox.ac.uk
**
ripley@stats.ox.ac.uk

*Tue, 30 Mar 1999 22:24:05 +0200*

>*From 0.63.4 or 0.64:
*
>* example(persp)
*
persp> x <- seq(-10, 10, length = 50)
persp> y <- x
persp> f <- function(x, y) {
r <- sqrt(x^2 + y^2)
10 * sin(r)/r
}
persp> z <- outer(x, y, f)
persp> z[is.na(z)] <- 1
persp> par(bg = "white")
persp> persp(x, y, z, theta = 30, phi = 30, expand = 0.5,
col = "lightblue")
Error: plot.new has not been called yet
This is probably not a problem in 0.63.3 too, but example() is broken
there. (If I paste the lines it, it works in 0.63.3 but not 0.63.4).
The error appears to be in the internal code for persp. If plot.new
has been called it works as expected, so `make check' appears to work.
--
Brian D. Ripley, ripley@stats.ox.ac.uk
Professor of Applied Statistics, http://www.stats.ox.ac.uk/~ripley/
University of Oxford, Tel: +44 1865 272861 (self)
1 South Parks Road, +44 1865 272860 (secr)
Oxford OX1 3TG, UK Fax: +44 1865 272595
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