15.11.6  FROM...  

[[X|Y] [FROM=n] [TO=n] [BY|WIDTH|STEP=n] [BINS|N=n]]
Specifies  the range of the histogram.  If FROM,TO and NBINS are specified
BY may not be specified.  FROM is the lowes bin edge.  TO is  the  highest
bin edge.  BY is the bin width, And N is the number of bins.

If  VALUES  is  specified then the FROM and TO are the center of the first
bin and the center of the last bin.

If  these  are  omitted then the data is scanned and the bins are arranged
according to the current scale values.  (See:SET SCALE) If the data to bin
is  arranged as a set of matching histograms, the final data set will have
the same x values as the initial.  A histogram has equally spaced x values
with identical DX.  Data sets match if the initial X and DX values are the
same.

The following are equivalent commands:
     TD:BIN FROM 0 TO 10 BY 1
     TD:BIN FROM 0 TO 10 N=10
     TD:BIN FROM 0 BY 1 N=10
     TD:BIN VALUES FROM .5 TO 9.5 BY 1