Effacer les filtres
Effacer les filtres

Plotting 3D data set over x-y plane (x,y,z coordinates)

9 vues (au cours des 30 derniers jours)
Paul
Paul le 16 Oct 2013
Réponse apportée : Paul le 16 Oct 2013
Hi,
I have a set of (x,y,z) vectors where (x) and (y) are coordinates and (z) is the magnitude at that coordinate point. I have been trying to plot these to make a heatmap/contour type plot, but have not been able to get the correct results. My latest attempt goes like this:
if true
% XYZ = [busCoordsX, busCoordsY, busVolts];
[X,Y,Z] = meshgrid(busCoordsX, busCoordsY, busVolts);
vq = griddata(busCoordsX, busCoordsY, busVolts, XYZ, X, Y, Z);
figure; surf(X,Y,vq);
end
busCoordsX, busCoordsY and busVolts are 130x1 vectors (double).
The error I'm getting is:
Error using scatteredInterpolant The number of data point locations should equal the number of data point values.
Error in griddata>useScatteredInterp (line 188) F = scatteredInterpolant(inargs{1}(:),inargs{2}(:),inargs{3}(:), ...
Error in griddata (line 125) vq = useScatteredInterp(inputargs, numarg, method, 'none');
Error in plotVoltage3D (line 54) vq = griddata(busCoordsX, busCoordsY, busVolts, XYZ, X, Y, Z);
Please help!
Thanks.

Réponses (2)

Adam Filion
Adam Filion le 16 Oct 2013
Modifié(e) : Adam Filion le 16 Oct 2013
Try:
F = scatteredInterpolant(busCoordsX,busCoordsY,busVolts);
[xx,yy]=meshgrid(busCoordsX,busCoordsY);
zz = F(xx,yy);
contour(xx,yy,zz)
surf(xx,yy,zz)

Paul
Paul le 16 Oct 2013
Hi Adam,
Thanks for the quick response. The code does mostly what I'm looking for, however, it includes a bunch of lines and doesn't quite get the plot I'm looking for. Ultimately, I'd like a scatter plot of the (x,y) points and the voltage magnitudes overlayed with a surface plot. The attached pictures probably makes more sense.
Again, thanks for your help!

Catégories

En savoir plus sur Lighting, Transparency, and Shading dans Help Center et File Exchange

Community Treasure Hunt

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

Start Hunting!

Translated by