Contour plot for given x,y,z

11 vues (au cours des 30 derniers jours)
Manish Kumar
Manish Kumar le 13 Mar 2019
Modifié(e) : KSSV le 13 Mar 2019
Dear All,
I have x, y, and z data. I was unable to plot 2D contour. 1st column is x, 2nd column is y and 3rd column is z. Kindly help.
  4 commentaires
madhan ravi
madhan ravi le 13 Mar 2019
why not contour() ?
Manish Kumar
Manish Kumar le 13 Mar 2019
i have tried
contour (x,y,z)
Error is:
Error using contour (line 48)
Z must be at least a 2x2 matrix.
Error in Untitled (line 1)
contour (x,y,z)

Connectez-vous pour commenter.

Réponse acceptée

KSSV
KSSV le 13 Mar 2019
Modifié(e) : KSSV le 13 Mar 2019
[num,txt,raw] = xlsread('Book1.xlsx') ;
x = num(:,1) ;
y = num(:,2) ;
z = num(:,3) ;
figure(1)
scatter(x,y,20,z,'filled') ; colorbar
%% Method 1 / Griddata
nx = 500 ; ny = 500 ;
[X,Y] = meshgrid(linspace(min(x),max(x),nx),linspace(min(y),max(y),ny)) ;
Z =griddata(x,y,z,X,Y) ;
figure(2)
contour(X,Y,Z) ;
figure(3)
pcolor(X,Y,Z)
shading interp
%% Method 2 simple reshaping
x = unique(x) ; nx = length(x) ;
y = unique(y) ; ny = length(y) ;
Z = reshape(z,ny,nx) ;
figure(4)
contour(x,y,Z)

Plus de réponses (0)

Catégories

En savoir plus sur Contour Plots dans Help Center et File Exchange

Tags

Community Treasure Hunt

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

Start Hunting!

Translated by