GRAPH:histograms

HISTYP

 See the SET PCHAR command for information on how to set fill patterns,
 colours, and relative bar size for histograms.

 HISTYP = 0 - (default value) line graph, not a histogram
          1 - histogram with no tails and profile along the x-axis
              May control the width and colour individual bars
          2 - histogram with tails to y=0 and profile along the x-axis
              May control the fill pattern, width, colour of each bar
          3 - histogram without tails and profile along the y-axis
              May control the height and colour of each bar
          4 - histogram with tails to x=0 and profile along the y-axis
              May control the fill pattern, height, colour of each bar

filling

 For HISTYP = 1 or 3:
 To fill the area under the histogram, use the SET LINTYP command. This
 fills the entire area under the histogram with a fill pattern.
 Use a value between 101 and 110 to use hatch pattern 1 through 10, use
 a value between 211 and 299 to use dot pattern 11 through 99.
 See also under HELP:  SET GPLOT_keywords LINTYP

 For HISTYP = 2 or 4: 
 To fill the area under each histogram bar, use the SET PCHAR command.
 This allows you to fill each histogram bar with a different fill pattern.
 Use a value between 1 and 10 to use hatch pattern 1 through 10, use a
 value between 11 and 99 to use dot pattern 11 through 99.
 See also under HELP:  SET PHYSICA_keywords PCHAR