capture program drop counter
set more off
set obs 10
gen counter=0
local i=1
while `i'<=10000 {
quietly gen heads=0
quietly replace heads = heads + int(uniform()*2)
quietly egen sum counter = counter+1 if sum==3
drop heads sum
disp `i'
local i=`i'+1
}
为什么这个程序一运行就出现
counter already defined,怎么消除这个问题啊??