HISTO4 calculates histogram for rows and supports data compression R = HISTO4(Y) R is a struct with th fields R.X are the bin-values R.H is the frequency of occurence of value X R.N are the number of samples HISTO4 might be useful for data compression, because [R,tix] = histo4(Y) is the compression step R.X(tix,:) is the decompression step The effort (in memory and speed) for compression is O(n*log(n)) The effort (in memory and speed) for decompression is only O(n) see also: HISTO, HISTO2, HISTO3, HISTO4 REFERENCE(S): C.E. Shannon and W. Weaver "The mathematical theory of communication" University of Illinois Press, Urbana 1949 (reprint 1963).

- histo HISTO calculates histogram for each column

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