histo

 HISTO calculates histogram for each column
 [H,X] = HISTO(Y,Mode)
        
   Mode 
    'rows' : frequency of each row
    '1x'   : single bin-values 
    'nx'   : separate bin-values for each column
   X  are the bin-values 
   H  is the frequency of occurence of value X 

 HISTO(Y) with no output arguments:
    plots the histogram bar(X,H)

 more histogram-based results can be obtained by HIST2RES2  

 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).