How to plot a matrix in 3d?
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I would like to plot a simple square matrix in a 3d plot, where in xlabel there is the index of rows or colums as well for the ylabel.
I would like to see the dots as values and not a surface.
Then can you also tell me how to view just one axis and the zaxis at the same time? the only option is to pan?
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Answers (1)
Shubham
on 3 Dec 2023
I understand that you want to plot a square matrix in 3D while using the row and column indices as x and y-axis and values as z-axis. You also want to view only one axes (x-axis or y-axis) and z-axis at the same time.
You can refer to the following code snippet below:
% Example square matrix of random numbers
A = randi(100,100);
[n, ~] = size(A);
% Create a grid of indices for the rows and columns
[X, Y] = meshgrid(1:n, 1:n);
% Flatten the matrices and plot
x = X(:);
y = Y(:);
z = A(:);
figure;
plot3(x, y, z, '.');
xlabel('Row Index');
ylabel('Column Index');
zlabel('Value');
grid on;
The above code plots the square matrix as desired. For viewing the plot on an x-z plane you can have look at the following code:
% Adjust the view to see only one axis and the z-axis
% For example, to see the x-axis (row index) and the z-axis
view(0, 0); % This sets the azimuth to 0 and the elevation to 0
% Alternatively, to see the y-axis (column index) and the z-axis
% view(90, 0);
% This sets the azimuth to 90 and the elevation to 0
I hope this helps!!
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