On 16/06/2008 4:57 PM, Wesley Tansey wrote:
If your data is really a bunch of points, not on a grid, then you need
to use plot3d() to plot it as points, or convert it to a surface. The
interp() function in the akima package can do that. (There are lots of
other possibilities too.)
Actually, my data is on a grid. The values are something like 0 < x < y <
0.05, with a 0.00005 step for both x and y. I tried using interp() as
follows:
data <- ..
x <- data$X
y <- data$Y
z <- data$Z
temp <- interp(x, y, z)
plot.new()
image(temp, add=TRUE)
Normally you would not use plot.new(), and you would skip add=TRUE. Let
image work out the scale of the plot. (add=TRUE tells it to use the
existing scale, among other things.)
Duncan Murdoch
I figured showing an image would just verify that the grid was formed
correctly, but that didn't seem to work.
Wesley
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