How to know the bin ranges of a histogram

Dear all,

I have a 2D coordinates files (PC1-PC2.txt, attached) in which each row contains two values and corresponds to a point in space.

by using:

D=dlmread('PC1-PC2.txt');
counts=hist3(D,[40,40]);

I can get a 40 by 40 matrix in which each element represents the number of the original values in the 2-column matrix D falling into the corresponding bin of the histogram.However, how could I get the exact ranges of each bin of the histogram?

And then I wish to figure out which of the histogram (counts) bins each point (each line) in the matrix D falls into. How should I do that?

Best regards.

Yeping Sun

Answer 1

[Walter Roberson]

[counts, bincenters] = hist3(D,[40,40]);

http://www.mathworks.com/help/stats/hist3.html

"[N,C] = hist3(X,...) returns the positions of the bin centers in a 1-by-2 cell array of numeric vectors"

[Yeping Sun]

Thank you! By using:

[counts, bincenters] = hist3(D,[40,40]);

I get:

 bincenters = 

    [1x40 double]    [1x40 double]

But how to show these numbers of the bincenters?

[Walter Roberson]

disp('bin x')
bincenters{1}
disp('bin y')
bincenters{2}