GRADAR Procedure

Example 4: Using Multiple Classification Variables in Radar Charts

Features:	CHART statement options: ACROSSVAR= DOWNVAR= FREQ= STARTYPE= NCOLS= NROWS= STARLEGEND=
Sample library member:	GRRTWOWY

You can study the effects of two classifications simultaneously with a two-way comparative radar chart. This arrangement provides the opportunity to discover both one-way marginal effects and interaction effects. To produce the chart, use both the ACROSSVAR= and DOWNVAR= options.

The ACROSSVAR= option specifies variable DAY as the variable whose values determine the rows in the chart matrix. The DOWNVAR= option specifies variable PROCESS as the variable whose values determine the columns in the chart matrix. The STARTYPE= option determines that the stars are displayed with rays emanating from the inner circle. The NROWS= and NCOLS= options specify the number of rows and columns in the chart. The STARLEGEND=CLOCK option generates a legend that identifies spoke positions. Value CLOCK determines that the positions are identified using a clock metaphor.

goptions reset=all border;
title "Capacitor Failures by Cleaning Process and Day";

proc gradar data=sashelp.failure;
    chart cause / acrossvar=day
    downvar=process
    freq=count
    startype=spoke
    nrows=2 ncols=5
    starlegend=clock;
run;
quit;