Plot 2D data colormap

77 vues (au cours des 30 derniers jours)
Dusaucy Camille
Dusaucy Camille le 26 Mar 2021
Hello,
I have a file with 3 columns: x,y and z and I would like to plot a 2D map with the value of data z at the coordinate (x,y) with a colorbar that is in the range of the z-data (z is not a function of x and y). My points are from an unscructured grid point. I already try to use scatter and pcolor but I did not succeed to do this.
Could you help me to do this ? Thank you in advance !!
Camille From Belgium
  3 commentaires
darova
darova le 26 Mar 2021
Better be to place your comment in the answer section
Bobby Fischer
Bobby Fischer le 27 Mar 2021
Okay.

Connectez-vous pour commenter.

Réponse acceptée

Bobby Fischer
Bobby Fischer le 27 Mar 2021
This could help:
x = -3 + 6*rand(50,1);
y = -3 + 6*rand(50,1);
v = sin(x).^4 .* cos(y);
F = scatteredInterpolant(x,y,v);
[xq,yq] = meshgrid(-3:0.1:3);
F.Method = 'linear';
vq1 = F(xq,yq);
figure(1), close(1), figure(1)
plot3(x,y,v,'mo')
hold on
mesh(xq,yq,vq1)
title('Nearest Neighbor')
legend('Sample Points','Interpolated Surface','Location','NorthWest')
view(2)
colormap default
colorbar

Plus de réponses (0)

Community Treasure Hunt

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

Start Hunting!

Translated by