Histograms
It is possible to draw four types of histograms using the
HISTOGRAMTYPE
characteristic approach, or you can use the \HISTOGRAM
qualifier to plot a histogram
with tails to y=0 and profile along the x-axis.
Using the HISTOGRAMTYPE characteristic
The table below shows the histogram type that will be produced depending on the value of
HISTOGRAMTYPE
.
HISTOGRAMTYPE |
result |
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 |
Using the \HISTOGRAM qualifier
The \HISTOGRAM
qualifier is inconsistent when used in conjunction with the
\AXESONLY
qualifier.
Using the \HISTOGRAM
qualifier is equivalent to using a HISTOGRAMTYPE
setting of 2
. A histogram with tails to y=0 and profile
along the x-axis will be plotted. The following three commands:
SET HISTOGRAMTYPE 2 ! force histogram plotting
GRAPH X Y ! plot axes and histogram
SET HISTOGRAMTYPE 0 ! reset to default value
are equivalent to the single command:
GRAPH\HIST X Y
Filling
For information on how to fill the area under a histogram, see the
AREAFILLCOLOR
characteristic. For histograms with tails, types 2
and 4
, it is possible to
fill each histogram bar with a different color. For types 1
and 3
,
the area under a histogram can be filled with a single color.
For an example of various types of filled histograms see the histogram example.