1D to 2D interpolation

4 Ansichten (letzte 30 Tage)
maubars
maubars am 14 Okt. 2020
Kommentiert: maubars am 14 Okt. 2020
I would like to know how griddata operate. I would like to scatter 2D points to a 3D grid using the griddata interpolate. The code which brings some errors.
x=1:1:10;
y=11:1:20;
z= sqrt(x.^2+y.^2)
[xx,yy] = meshgrid(linspace(min(x),max(x),200),linspace(min(y),max(y),200))
zz=griddata(x,y,z,xx,yy,'nearest')
The error is as seen below.
Warning: The underlying triangulation is empty - the points may be collinear.
> In griddata>useScatteredInterp (line 183)
In griddata (line 120)
zz =
[]

Akzeptierte Antwort

Matt J
Matt J am 14 Okt. 2020
Bearbeitet: Matt J am 14 Okt. 2020
In order for griddata to work meaningfully, the points xx,yy where you want to interpolate must be surrounded by scattered data points x,y (that's what "interpolation" means). Here, you have it the other way around.

Weitere Antworten (0)

Kategorien

Mehr zu Interpolation finden Sie in Help Center und File Exchange

Produkte

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!

Translated by