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How to obtain a histogram for 3d data?

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Jessie Bessel
Jessie Bessel am 20 Mär. 2022
Kommentiert: Jessie Bessel am 20 Mär. 2022
Hello!
I'm curious about an extension of the hist3 function in matlab. For a data set in 2D, hist3 is a 3D representation shaped like the data. For example, for matrix A, I get the results:
load A
plot(A(:,1),A(:,2),'linewidth',2); axis tight; grid on;
figure; hist3(A,'Nbins',[30 30],'CDataMode','auto','FaceColor','interp');
But if we consider a 3D data input like B:
load B
plot3(B(:,1),B(:,2),B(:,3),'linewidth',2); axis tight; grid on;
Is there any function that can give a representation shaped like the data based on histogram? Something similar to hist3? To show the histogram and the shape of the data too?
Thank you!

Antworten (1)

Torsten
Torsten am 20 Mär. 2022
Bearbeitet: Torsten am 20 Mär. 2022
Since your curves are all 1d, a 1d- histogram suffices if you identify x-axis coordinate with curve length or parametrized points in 2d resp. 3d.
A histogram for 3d-data in general is not possible. It would be a representation in 4d - and humans live in 3d.
  3 Kommentare
Torsten
Torsten am 20 Mär. 2022
Yes, that's why I suggested a 1d-histogram. For a presentation, show the curve in 3d where the distribution lives together with the 1d-histogram in which the x-axis represents curve length.
Jessie Bessel
Jessie Bessel am 20 Mär. 2022
Can you help me with a little exemple based on my data, please? I didn't quite understand the processing part.

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