Hi
Renaud Lancelot wrote:
Dieter Menne a écrit :
You wrote:
---
I have matrix (n x3) that represents discrete data. Each row of matrix
is 3-D point (x,y,z). I would like to get contour map (z value) at two
dimension (x,y). How can I use related contour function to do this job?
---
Paul Murrell
You wrote:
---
I have matrix (n x3) that represents discrete data.
Each row of matrix is 3-D point (x,y,z). I would like
to get contour map (z value) at two dimension
(x,y). How can I use related contour function to do
this job?
---
Paul Murrell ([EMAIL PROTECTED]) sent me his little
clines pa
Hi
library(akima)
function
contour(interp(x,y,z))
is one possibility
Cheers
Petr
On 19 Jan 2058 at 48:211, L Z wrote:
> Question:
> I have matrix (n x3) that represents discrete data.
> Each row of matrix is 3-D point (x,y,z). I would like
> to get contour map (z value) at two dimension
> (x
On Sun, 21 Dec 2003, Spencer Graves wrote:
> Have you considered "interp", as in the following example:
in the akima package, just to make this plain.
>
> XY <- expand.grid(x=1:11, y=1:11)
> XY$z <- XY$x+XY$y
> contour(interp(XY$x, XY$y, XY$z))
>
> hope this helps. spencer graves
>
> Thomas
Have you considered "interp", as in the following example:
XY <- expand.grid(x=1:11, y=1:11)
XY$z <- XY$x+XY$y
contour(interp(XY$x, XY$y, XY$z))
hope this helps. spencer graves
Thomas W Blackwell wrote:
Dear L Z -
Before using contour() one needs to interpolate the z values
to all points i
Dear L Z -
Before using contour() one needs to interpolate the z values
to all points in a rectangular grid. 2D interpolation is not
trivial. The package KernSmooth (case-sensitive) will do this
for a density estimate but not, apparently, when z values are
given. Perhaps packages splines or
Question:
I have matrix (n x3) that represents discrete data.
Each row of matrix is 3-D point (x,y,z). I would like
to get contour map (z value) at two dimension
(x,y). How can I use related contour function to do
this job?
I am not sure if I clarify this question. For example,
we can get point (x
