. webuse systolic, clear
. anova systolic drug
兩因素：
. anova systolic drug disease
. anova systolic drug disease drug#disease
或
. anova systolic drug##disease
三因素
. webuse manuf
. anova yield temp chem temp#chem meth temp#meth chem#meth temp#chem#meth
或
. anova yield temp##chem##meth
ANCOVA
. webuse census2
. quietly summarize age
. generate mage = age - r(mean)
. anova drate region c.mage region#c.mage
嵌套的
. webuse machine, clear
. anova output machine / operator|machine /, dropemptycells