15.20.2  HISTOGRAMS 

This    creates    HBOOK    histograms   or   modifies   the   histograms.
See:Command SET HISTOGRAM.  You may add together histograms or add ntuples
to  histograms.   The  variables  in  NTUPLES  may  be  added  to  several
histograms all in one operation.
DEFINE HISTOGRAMS {IDENT[=FROM n][TOn]| APPEND=n| CURRENT| NEXT| PREVIOUS|
     FIRST| LAST| ALL} [LOG[=ON|OFF]]
                            Histogram selection
     [AREA|DIRECTORY="name"]                     [ENTRIES[=ON|OFF]]
     [HISTOGRAM[=ON|OFF]]  [MESH[=ON|OFF]]       [ARRAY[=ON|OFF]]
     [NTUPLES[=ON|OFF]]    [SELECT|NAME="hist name"]
     [CONFIRM[=ON|OFF]]
                            Histogram creation
     [[[X|Y][FROM n][TO n][BY n][BINS=n]]|
     [SETS=[FROM] n1 [TO] [n2]]]                 [CHECK[=ON|OFF]]
     [RANGE=n]             [PROFILE[=ON|OFF]]
                          Histogram modification
     [BINSZ[=ON|OFF]]      [DEFNME='name']       [ERRORS[=ON|OFF]]
     [STATISTICS[=ON|OFF]]                       [ZERO] [SECTION]]
                             Histogram Filling
     [[ADD|SUBTRACT|MULTIPLY|DIVIDE=n1[,n2]]     [FACTOR=f1[,f2]]
     [CYCLE[=ON|OFF]]]
                               Print options 
     [DEFAULT[=ON|OFF]]    [PRAUTOMATIC]         [PRBIGBI=n]
     [PRBLACK]             [PRCHANNELS[=ON|OFF]]
     [PRCONTENTS[=ON|OFF]]                       [PRERRORS[=ON|OFF]]
     [PRHISTOGRAM[=ON|OFF]]                      [PRINTEGRAL[=ON|OFF]]
     [PRLOGARITHMIC|PRLINEAR[=ON|OFF]]           [PRLOW[=ON|OFF]]
     [PRMAXIMUM=n]         [PRMINIMUM=n]         [PRROTATE[=ON|OFF]]
     [PRSTAR]              [PRSTATISTICS[=ON|OFF]]
     [PRSQUEEZE[=ON|OFF]]  [PR1PAGE[=ON|OFF]]    [PR2PAGE[=ON|OFF]]
     [PRPAGE=n]            [TITLE="general_title"]