MATLAB: How to know the bin ranges of a histogram

2d histogrambin range

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

Best Answer

[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"
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