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Plotting in 3D from a table

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Soumyajit Samal
Soumyajit Samal on 13 Jul 2021
Answered: Chunru on 13 Jul 2021
I am given a csv file with 3 columns. The first column is to be the X coordinate, 2nd as Y coordinate and 3rd column as Z coordinate. How can i make a surface plot of this.

Answers (2)

Siddharth Solanki
Siddharth Solanki on 13 Jul 2021
You may use the readmatrix function for reading from the csv file and refer to this link for creating surface plots. This answer to a similar previous question might help.

Chunru
Chunru on 13 Jul 2021
'doc griddata' for more details.
rng('default')
xy = -2.5 + 5*rand([200 2]);
x = xy(:,1);
y = xy(:,2);
v = x.*exp(-x.^2-y.^2);
% x, y, and v are vectors containing scattered (nonuniform) sample points and data.
% Define a regular grid and interpolate the scattered data over the grid.
[xq,yq] = meshgrid(-2:.2:2, -2:.2:2);
vq = griddata(x,y,v,xq,yq);
% Plot the gridded data as a mesh and the scattered data as dots.
mesh(xq,yq,vq)
hold on
plot3(x,y,v,'o')
xlim([-2.7 2.7])
ylim([-2.7 2.7])

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