SET MODE VERIFY  ! histogram.notes
! -------
! The command "GO histogram" can be used to produce a histogram-like plot.
! Basic instructions on its use are given when the command is issued.
! You will need only to define the variable HISTOVAR and set the region
! of interest.
! What follows are notes on the advanced usage of the command.
! -------
! SMOOTHING THE OUTPUT PLOT:
! By default a smoothing window of width 11 points (@SBX:11) is applied 
! to HPDF, the unsmoothed estimate of the Probability Density Function.
! To modify the width of the smoothing window use the commands
! "SHOW ALIAS HISTPLOT" and "DEFINE ALIAS HISTPLOT ...".  Redefine the 
! smoothing window and then give the command "GO histogram.plot"
! Also, by default the variable HPDF is computed using an approximate
! derivative based on an interval of 10 data points.  For large data sets a
! a larger interval may be preferable.  Use "SHOW VARIABLE HPDF" to see the
! current definition and enlarge it to, say, 20 points with
! LET HPDF = 20/((HVAL[I=@SHF:+10]-HVAL[I=@SHF:-10])*HCOUNT[X=@MAX])
! Then give the command "GO histogram.plot"
message ****
! -------
! VERY LARGE AMOUNTS OF DATA
! By default "GO histogram" can accept up to 40000 points.  To increase
! this limit copy the file $FER_DIR/fer/go/histogram.jnl into your own
! directory and modify the line which defines the axis HISTSIZE.
! -------
! WIDE-RANGING DATA VALUES
! FERRET writes your data to a disk file and uses the Unix command sort to
! assist with producing histograms.  By default FERRET writes your data to
! disk using a FORTRAN format of F18.9.  If this is inadequate to describe
! your data copy the file $FER_DIR/fer/go/histogram.jnl into your own
! directory and modify the FORTRAN FORMAT statement in it.
! -------
! HISTOGRAM PLOTS AND VIEWPORTS
! The GO histogram command uses viewports to help with labelling the plot.
! If this conflicts with your uses of viewports copy the file
! $FER_DIR/fer/go/histogram.plot into your own directory and modify 
! the definitions of viewports hvp1 and hvp2 to suit your needs. 

SET MODE/LAST VERIFY