Generate 20th percentile woth weights

[Alexandra Vasilyeva]

Hello,
I a new to Stata, and I have got a following question. Could someone please kindly help me?
I need to generate a 20th percentile. All variables must be used with weights.
When I enter pctile variable [aw=weight] if variable2=1, p(20), Stata gives me a mistake-variable 1 is laready defined. What should i do?

[Nick Cox]

pctile variable [aw=weight] if variable2=1, p(20)

is not legal code, but it would not lead to an error message about "variable 1".

Perhaps you meant

_pctile variable [aw=weight] if variable2==1, p(20)

Either way, please note the FAQ Advice

Say exactly what you typed and exactly what Stata typed (or did) in response. N.B. exactly! If you can, reproduce the error with one of Stata's provided datasets, a small fragment of your dataset, or a simple concocted dataset that you include in your posting.