st: variable mean and r(mean), why do they differ?

["Raoul C Reulen" <r.c.reulen@bham.ac.uk>]

Dear Statalisters,

 

If I want to save the mean of a variable into a new variable, I would first:

 

.sum var1

.gen var2, r(mean)

 

But if I subtract var1-var2, the outcome is almost, but not exactly "0". How can make sure that both means are equal? I have tried .round, .int. , but that doesn't work. Do I have to change the storage type? Thanks for the advice.

 

Raoul

 


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