SAS Macro Programs for Statistical Graphics: DOTPLOT
$Version: 1.5-3 (11 Dec 2008)
Michael Friendly
York University
DOTPLOT produces grouped and ungrouped dot charts, as described in
"Section 2.5".
Parameters
- DATA=_LAST_
- Name of the input data set
- XVAR=
- Horizontal (response) variable
- XORDER=
- Plotting range for response. Specify
XORDER in the form XORDER = low TO
high BY step.
- XREF=
- Specifies the horizontal values at which
reference lines are drawn for the response
variable. If not specified, no reference lines
are drawn.
- YVAR=
- Vertical variable (observation label) for
the dot chart. This should specify a character
variable. At most 16 characters of the value
are used for the label.
- YSORTBY=&XVAR
- How to sort the observations. The default,
YSORTBY=&XVAR, indicates that observations are
sorted in ascending order of the response
variable.
- YLABEL=
- Label for y variable. If not specified,
the vertical axis is labelled with the name of
the YVAR= variable.
- GROUP=
- Vertical grouping variable. If specified,
a grouped dot chart is produced with a separate
panel for each value of the GROUP= variable.
- GPFMT=
- format for printing group variable value
(include the "." at the end of the
format name).
- CONNECT=DOT
- Specifies how to draw horizontal lines for
each observation. Valid values are ZERO, DOT,
AXIS, or NONE. The default, CONNECT=DOT, draws
a dotted line from the Y axis to the point.
CONNECT=ZERO draws a line from an X value of 0
to the point. CONNECT=AXIS draws a line from
the Y axis to the plot frame at the maximum X
value. CONNECT=NONE does not draw a line for
the observation.
- DLINE=2
- Line style for horizontal lines for each
observation.
- DCOLOR=BLACK
- Color of horizontal lines
- ERRBAR=
- Name of an input variable giving length of
error bar for each observation. If not
specified, no error bars are drawn.
- NAME=DOTPLOT
- The name assigned to the graph in the
graphic catalog.
GOPTIONS required
DOTPLOT plots each observation in a row of the graphics output
area. Therefore the VPOS= graphics option should specify a
sufficient number of vertical character cells. The value for VPOS=
should be
VPOS >= number of observations + number of groups + 8
Example
%include data(auto) ;
*include dotplot ;
proc format;
value $origin 'A'='American'
'E'='European'
'J'='Japanese';
goptions vpos= 80 hpos=80;
%dotplot(data=auto,
xvar=mpg, yvar=model,
group=origin,gpfmt=$origin.);