Dear Statalist members,
I have the following question:
group x
1 -5
1 -10
1 32
1 45
1 76
2 -9
2 24
2 32
Whithin each group, I would like to create two
variables that take the absolute value of x when x is
negative, that is I would like to obtain:
group x absx1 absx2
1 -5 5 .
1 -10 . 10
1 32 . .
1 45 . .
1 76 . .
2 -9 9 .
2 24 . .
2 32 . .
I have manually typed:
bysort group: gen absx=abs(x) if x <0 & _n==1;
bysort group: gen absx=abs(x) if x <0 & _n==2;
since the number of negatives varies depending on the
situation, does anyone know how to write that in a
loop, so that it cretaes automatically different absx
depending on the numer of negatives present in the
data?
any help would be really appreciated
thanks
sara
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