1 我看的是教程上说直接让y对x1 x2 x1*x2做anova，而stata12显示 x1*x2 not be found
2 还有协方差分析，continuous命令的结果是option continuous(age) not allowed
Option continuous(age) only allowed under version control with version < 11. Or, use the c. factor variable operator on
your continuous variable
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