Visualizing Categorical Data: bars

The bars macro ( get bars.sas)

Create an annotate data set to draw error bars

Usage

The arguments may be listed within parentheses in any order, separated by commas. For example:

  %bars(class=age, var=logodds, lower=lower, upper=upper);
  proc gplot data=mydata;
     plot logodds * age / anno=_bars_;

Parameters

DATA=

Name of input data set [Default: DATA=_LAST_]

VAR=

Name of the response variable, to be plotted on the axis given by the BAXIS= parameter.

CLASS=

Name of the independent variable, plotted on the other axis.

CVAR=

Name of a curve variable, when PROC GPLOT is used with the statement PLOT &VAR * &CLASS = &CVAR.

BY=

Name of a BY variable for multiple plots, when PROC GPLOT is used with the statement BY &BY;.

BAXIS=

One of X or Y, indicating the axis along which error bars are drawn [Default: BAXIS=Y]

BARLEN=

A numeric variable or constant giving the error bar length, for example, when the input data set contains a standard error variable or multiple thereof. If BARLEN= is given, the LOWER= and UPPER= values are ignored, and error bars are drawn at the values &VAR +- &Z * &BARLEN.

Z=

A numeric value giving the multiplier of the BARLEN= value used to determine the lower and upper error bar values.

LOWER=

A numeric variable or constant giving the lower error bar value. Use the LOWER= and UPPER= parameters if the error bars are non-symmetric or if the lower and upper values are contained as separate variables in the input data set.

UPPER=

A numeric variable or constant giving the upper error bar value.

TYPE=

Type of error bars to be drawn: one of UPPER, LOWER, or BOTH and possibly one of ALT or ALTBY. [Default: TYPE=BOTH]

TYPE=LOWER draws only the lower error bars;

TYPE=UPPER draws only the upper error bars;

TYPE=BOTH draws both upper and lower error bars.

Use TYPE=ALT BOTH to have the error bars alternate (lower, upper) over observations in the input data set;

use TYPE=ALTBY BOTH to have the error bars alternate over values of the BY= variable.

SYMBOL=

The plotting symbol, drawn at (&CLASS, &var). If not specified, no symbols are drawn.

COLOR=

Color for lines and symbols, a character constant (enclosed in quotes), or variable name [Default: COLOR='BLACK']

LINE=

The Annotate line style used for error bars [Default: LINE=1]

SIZE=

Size of symbols and thickness of lines [Default: SIZE=1]

BARWIDTH=

The width of error bar tops, in data units [Default: BARWIDTH=.5]

OUT=

Name of the output data set, to be used as an Annotate data set with PROC GPLOT [Default: OUT=_BARS_]

See also