variable id does not uniquely identify t
> he observations
Your data are currently wide. You
are performing a reshape long.
You specified i(code) and j(year).
In the current wide form, variable
code should uniquely identify the
observations. Remember this
picture:
long
> wide
+---------------+
> +------------------+
| i j a b |
> | i a1 a2 b1 b2 |
|---------------| <--- reshape -
> --> |------------------|
| 1 1 1 2 |
> | 1 1 3 2 4 |
| 1 2 3 4 | | 2 5 7 6 8 |
| 2 1 5 6 | +------------------+
| 2 2 7 8 |
+---------------+
Type reshape error for a list of the problem observations.
r(9);
.
这是什么意思呢
|