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       histo - compute 1-dimensional histogram of N data columns


       histo [-c][-p] xmin xmax nbins
       histo [-c][-p] imin imax


       Histo  bins  columnular  data  on  the standard input between the given
       minimum and maximum values.  If three command line arguments are given,
       the  third  is  taken  as the number of data bins between the first two
       real numbers.  If only two arguments are given, they are  both  assumed
       to  be  integers,  and  the  number of data bins will be equal to their
       difference plus one.  The bins are always of equal size.

       The output is N+1 columns of data (for  N  columns  input),  where  the
       first column is the centroid of each division, and each row corresponds
       to the frequencies for each column around that value.

       If the -c  option  is  present,  then  histo  computes  the  cumulative
       histogram  for  each  column  instead of the straight frequencies.  The
       upper value of each bin is printed also instead of the centroid.   This
       may  be useful in computing percentiles, for example.  Values below the
       minimum specified are still counted in the cumulative total.

       The -p option tells histo to report the percentage of the total  number
       of  input  lines  rather  than  the  absolute counts.  In the case of a
       cumulative total, this yeilds the percentile values  directly.   Values
       above the maximum are counted as well as values below in this case.

       All  input  data  is  interpreted  as  real values, and columns must be
       white-space separated.  If any  value  is  less  than  the  minimum  or
       greater  than  the  maximum, it will be ignored unless the -c option is


       To count data values between -1 and 1 in 50 bins:

         histo -1 1 50 < input.dat

       To count frequencies of integers between 0 and 255:

         histo 0 255 < input.dat


       Greg Ward


       cnt(1), neaten(1), rcalc(1), rlam(1), tabfunc(1), total(1)