SET:PHYSICA_keywords:PCHAR:histograms:fill
1 <= |fill[i]| <= 10 means fill with hatch pattern
The histogram bar at (x[i],y[i]) will be filled with hatch pattern
|fill[i]|.
fill[i] = 0 means do not fill the histogram bar
fill[i] > 0 means the histogram bar outline will be drawn
fill[i] < 0 means the histogram bar outline will not be drawn
A hatch pattern is composed of an angle and one to ten spacings.
These spacings are simply cycled through as each histogram bar is
being filled, that is, a line is drawn inside the histogram bar at
the specified angle, then a parallel line is drawn at the first
spacing, then another parallel line is drawn at the second spacing,
and so on for the number of spacings in that pattern. This process
is repeated until the histogram bar is filled. The hatch patterns
can be redefined with the SET HATCH command and displayed with the
DISPLAY command. There are ten hatch patterns available.
11 <= |fill[i]| <= 99 means fill with grey scale. The histogram
bar at (x[i],y[i]) will be filled with grey scale |fill[i]|.
fill[i] > 0 means draw
fill[i] < 0 means erase
A grey scale dot pattern is of the form: uv, where the digit u is
the increment number of dots to light up horizontally, 1 <= u <= 9,
and the digit v is the increment number of dots to light up
vertically, 1 <= v <= 9. For example, a grey scale dot pattern of 34
means to light up every third dot horizontally and every fourth dot
vertically. If uv is negative, then the dots are erased instead of
lighted. The grey scale pattern |fill[i]| will be used to fill the
histogram bar at point (x[i],y[i]).