[R] Math symbols for labels in Perspective plots
Erin Hodgess
hodgess at gator.dt.uh.edu
Sat Jun 10 08:23:57 CEST 2006
Dear Harsh:
I stole these lines from the Persp examples and
the plotmath examples.
> x <- seq(-10, 10, length= 30)
> y <- x
> f <- function(x,y) { r <- sqrt(x^2+y^2); 10 * sin(r)/r }
> z <- outer(x, y, f)
> z[is.na(z)] <- 1
> op <- par(bg = "white")
> persp(x, y, z, theta = 30, phi = 30, expand = 0.5, col = "lightblue")
> 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 = "Sinc( r )"
+ ) -> res
>
> ?plotmath
> title( expression(paste(plain(sin) * phi, " and ",
+ plain(cos) * phi)))
>
Hope this helps!
By the way, this is from Windows.
Sincerely,
Erin Hodgess
Associate Professor
Department of Computer and Mathematical Sciences
University of Houston - Downtown
mailto: hodgess at gator.uhd.edu
Subject: [R] Math symbols for labels in Perspective plots
Hi ..
I would like to have math symbols in perspective plots
i tried : persp(x,y,z,xlab=expression(phi))
but it plots it as phi.
Thanks.
Harsh
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