3D Histogram of 50x50 data

Hello, I am looking to plot a 3D histogram (like the one in the attached snippet) in MATLAB. I have x and y axes which are 50 bins each, one is ranging from -4000 and 4000 and the other one from 0 and 8000. I just need to plot the binned values (as z) which is 50x50.

Thanks in advance.

Answer 1

[the cyclist]

You can make this style of plot using the histogram2 function.

[AS]

thanks @the cyclist for your answer but I am still unable to generate the histogram. I can generate the x and y axes with the bins I want, but how to plot the (already) binned values as height of the histogram. Could you please write the code, I am attaching the data here. The bin centers 50 each along x and y axes have been made bold in the excel sheet.

[the cyclist]

% Read the data from file
xyz = readmatrix("Histogram2_sample.xlsx");

% Get the x, y, and z values
x = xyz(2:end,1);
y = xyz(1,2:end)'; % Transpose to get a column vector
z = xyz(2:end,2:end);

% Flip x and z, because histogram algorithm requires increasing values
x = flipud(x);
z = flipud(z);

% Plot
figure
histogram2('XBinEdges',[x; x(end)+160],'YBinEdges',[y; y(end)+160],'BinCounts',z)

% Change the view to make the perspective similar to posted image
set(gca,"View",[145 30])

[AS]

awesome, thank you very much!!

Answer 2

[Diwakar Diwakar]

This code may help you:

% Generate some random data
data = randn(1000, 2) .* [4000, 8000] + [0, 4000];

% Define the bin edges
x_edges = linspace(-4000, 4000, 51);
y_edges = linspace(0, 8000, 51);

% Compute the histogram
histogram2D = hist3(data, 'Edges', {x_edges, y_edges});

% Plot the 3D histogram
figure;
bar3(histogram2D);
xlabel('X');
ylabel('Y');
zlabel('Count');
title('3D Histogram');

% Customize the plot appearance
colormap jet;  % Change the color map if desired
colorbar;  % Add a color bar