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st: Difference btw "clear" & "drop _all"
I am a newbie to STATA and I have a question regarding "clear" and "drop _all".
According to STATA, these two are supposed to be the same. However, if I use "clear", even my matrices are deleted from the memory, as opposed to "drop _all", which just deletes the variables but maintains matrices in the memory. Can anyone tell me more about the differences between these two commands?
Thank you very much!
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