The akima package has a somewhat problematic license (the ACM license,
which doesn't allow commercial use). The interp package provides some
of the same functionality but is free open source.
rgl has some support for output from interp. I forget if it would also
work with akima.
Duncan
On
I'll mention that the 'akima' package is also handy for this kind of
interpolation.
On 5/31/25 11:18, Duncan Murdoch wrote:
On 2025-05-31 7:04 a.m., ravi via R-help wrote:
Hi,
rgl plots seem to require the z object in the form of a matrix. I
would like some help in constructing this matrix
On 2025-05-31 7:04 a.m., ravi via R-help wrote:
Hi,
rgl plots seem to require the z object in the form of a matrix. I would like
some help in constructing this matrix when I cannot use the outer function. Let
me explain.
library(rgl)
library(plot3D)
x <- 1:10
y <- 1:20
fun1 <- function (x,y) {x
In the general case you cannot do that... you have to choose a way to
interpolate your data points from a known x,y partition like your first example
(your interpolation gets used as "f").
In the special case where your points in the data frame were generated as a
grid, then you should still ha
Hi,
rgl plots seem to require the z object in the form of a matrix. I would like
some help in constructing this matrix when I cannot use the outer function. Let
me explain.
library(rgl)
library(plot3D)
x <- 1:10
y <- 1:20
fun1 <- function (x,y) {x^2+y^2}
z <- outer(x,y, fun1)
open3d()
surface3d(x
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