/*************Figure 2***************************/
/* 
 This command tells SAS to write the frequencies to 
 a data set called frequencies
*/
ods output OneWayFreqs=frequencies;
/* Now compute and output the frequencies*/
proc freq data=sasdata.knobs;
 tables diameter;
run;
/* Now produce the needle plot */
proc sgplot data=frequencies;
 needle x=diameter y=frequency;
run;