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hist2 for the people

version (1.91 KB) by Nedialko Krouchev
2D histogram: Extract the number of joint events - (x,y) data value pairs


Updated 21 Sep 2006

No License

2D histogram: Extract the number of joint events - (x,y) data value pairs that fall in each bin of the grid defined by xedges and yedges.



which returns

1) N is a LENGTH(EDGES) vector, N(k) will count the value X(i) if EDGES(k) <= X(i) < EDGES(k+1). The last bin will count any values of X that match EDGES(end).

2) an index matrix BIN. If X is a vector, N(K) = SUM(BIN==K). BIN is zero for out of range values. If X is an m-by-n matrix, then, for j=1:n, N(K,j) = SUM(BIN(:,j)==K); end

Please, see the notes to HISTD too.

N.B. It is always a better idea to use the HISTC MEX (a much faster compiled C code) if you have it, then just replace the HISTD with HISTC in all calls contained in the hist2() .m function

Small print Note: There is a similar f/n - hist3 - in the R14 stats, but on top of everything else that makes it inaccessible, it looks looong

Cite As

Nedialko Krouchev (2021). hist2 for the people (, MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R10
Compatible with any release
Platform Compatibility
Windows macOS Linux

Inspired by: 2D Histogram Calculation

Inspired: Boost converter with pi controller

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