|
|
EXAMPLE 1
pl -prefab vbars data=data4 delim=tab x=1 y=2 vals=yes\
yrange=0 yinc=20 ygrid=yes barwidth=0.3
data4 file:
Group A 78 7
Group B 84 12
Group C 56 6
EXAMPLE 2
pl -prefab vbars data=data5 delim=tab x=1 y=2 err=3 \
y2=4 err2=5 errunder=yes ygrid=yes barwidth=0.1 \
name=Treatment name2=Control stubvert=yes
data5 file:
Test 3 76 19 84 14
Test 4 83 12 64 9
Test 5 95 11 92 13
...etc..
EXAMPLE 3
pl -prefab vbars data=data5 delim=tab x=1 y=2 err=3 y2=4 \
err2=5 erronly=yes name=Treatment name2=Control stubvert=yes \
errcolor=red errcolor2=blue sep=0.08 xgrid=yes ylog=log
EXAMPLE 4
pl -prefab vbars data=data18 x=1 y=2 crossover=0 \
color=blue vals=yes
The data18 file:
1992 -47
1993 -63
1994 -24
1995 12
..etc.
How to run these examples
DESCRIPTION
vbars is a
prefab
for producing bar graphs with vertical solid bars for one or two groups.
Two groups of values may be displayed if y2 (etc) are used, as in the second example.
Error bars may be added above or below the bar graph, or error bars alone may be rendered.
By default the X axis is categories, but it may be continuous numeric if xnumeric is used
(for chronological data use the
chron prefab
).
This prefab is based on
proc bars
.
PARAMETERS
-
-
Standard prefab parameters
are all supported. data, x and y are required.
y values should be numeric and will determine the height of bars.
x values determine bar locations.
-
-
color is the
color
of the first set of filled bars (default = orange)
-
-
barwidth is the width of the filled bars. This is a value in inches,
or may be given as line for very thin bars.
-
-
errcolor is the error bar
color
for the error bars associated with the first set of bars
(default = black).
-
-
errwidth is the width of error bar tails in inches (default = 0.08)
-
-
errthick is the thickness of the error bar lines (default = 0.5)
-
-
errunder may be set to yes if error bars should be drawn "under"
the filled bars (only the upward error bar is thus visible).
-
-
erronly may be set to yes if error bars only are desired,
without any filled bars.
-
-
xnumeric may be specified as yes to signify that X values
are numeric and not categories.
-
-
vals may be specified as yes to indicate that the
numeric values should be displayed near the top of each bar.
-
-
crossover may be specified as the value in Y where bars begin
to point downward instead of upward. For instance, crossover=0
is often useful when dealing with financial income, to show loss
using downward bars.
-
-
curve may be given as yes, or as a
linedetails
attribute, which causes a moving average curve to be fit to bars, and drawn behind
the bars. Not applicable to a second set of bars.
The order parameter may be set to the number of preceding data points
to be considered when computing averages (default = 5).
The following parameters are used when displaying two groups of values.
The second example above illustrates.
-
-
y2, color2, err2, and errcolor2 control the size and color
of the second set of bars, and the magnitude and color of error bars
associated with the second set. Default color2 is green.
-
-
sep controls bar separation (default=0.15)
-
-
name and name2 should be given as legend labels for the two groups.
If your data contains a field name header
and header=yes is specified, name defaults to the
y field name, and name2 defaults to the y2 field name (new in 2.04).
-
-
legend controls the
location
of the legend. Example: "legend=1 0.5" Default is min+0.4 max.
|
data display engine
Copyright Steve Grubb
|
