Hello, statalisters:
I have a variable (age) with 5 categories.
I would like to create age-category dummy.
I use the command, -xi-.
However, everytime, I type: xi: i.age
I obtained an error message: unrecognized command: _Iage_ r(199);
However, after that, I type: sum *age*. I can still find that Stata has
created those dummies.
Anyone knows why?
Thank you very much
JT
The following is the log-file:
sum *age*
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
id_age | 105117 68.8877 11.33323 35 197
age | 105117 3.876614 1.069753 1 5
. xi: i.age
i.age _Iage_1-5 (naturally coded; _Iage_1 omitted)
unrecognized command: _Iage_
r(199);
. sum *age*
Variable | Obs Mean Std. Dev. Min Max
-------------+--------------------------------------------------------
id_age | 105117 68.8877 11.33323 35 197
age | 105117 3.876614 1.069753 1 5
_Iage_2 | 105117 .0845915 .2782741 0 1
_Iage_3 | 105117 .1807985 .384853 0 1
_Iage_4 | 105117 .3700733 .4828263 0 1
-------------+--------------------------------------------------------
_Iage_5 | 105117 .3300513 .4702335 0 1
*
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