3D plot of 3 vectors

- error -

[Ameer Hamza]

Original question asked by Francesco Porretta, restored from cache: http://webcache.googleusercontent.com/search?q=cache:https://www.mathworks.com/matlabcentral/answers/666483-3d-plot-of-3-vectors

Dear all, I have the three vectors reported in the file "data.mat" (x,y,z respectively).

I need to 3D plot them. However, something strange happen, since the z vector is 0 all around the borders, but plotting it I obtained that z is 0 only in 4 points (along y=0 axis), as shown in the figure below:

I wrote this code, to do the plot above:

x = data(:,1);
y = data(:,2);
[X,Y] = meshgrid(x,y);
z = data(:,3)
Z = meshgrid(z);
sup = surf(X,Y,Z)

thanks in andvance for your help

Answer 1

[Ameer Hamza]

You first need to convert your data into a grid format using scattered interpolation

x = data(:,1);
y = data(:,2);
z = data(:,3);

mdl = scatteredInterpolant(x, y, z);
[xg, yg] = meshgrid(unique(x), unique(y));
zg = mdl(xg, yg);

sup = surf(xg,yg,zg)

[Francesco Porretta]

It works! thank you so much!

[Ameer Hamza]

I am glad to be of help!