HISTO3 calculates histogram and performs data compression R = HISTO3(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 valid (not NaN) samples Data compression can be performed in this way [R,tix] = histo3(Y) is the compression step R.tix provides a compressed data representation. R.compressionratio estimates the compression ratio R.X(tix) and R.X(R.tix) reconstruct the orginal signal (decompression) The effort (in memory and speed) for compression is O(n*log(n)). The effort (in memory and speed) for decompression is O(n) only. 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).