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st: RE: how to make xi dummies inherit labels


From   "Nick Cox" <n.j.cox@durham.ac.uk>
To   <statalist@hsphsun2.harvard.edu>
Subject   st: RE: how to make xi dummies inherit labels
Date   Wed, 2 Oct 2002 17:32:40 +0100

Roger Harbord
>
> Is there a way to make the dummy variables created by -xi-
> inherit their
> variable labels from the value labels of the variable in
> question?  It
> seems to me this would greatly improve the readability of
> the output of
> either
> -outreg- or -reformat-  after a regression command used with
> -xi-.
>
> Maybe I could write something to do this myself, but I
> can't believe
> someone hasn't done it before (but if so i've failed to findit).
>
> Below is an illustration of what happens at present.  I'd
> like e.g. the
> variable label of _Iage10yr2_2 to be "25-34" (the value
> label for 2)
> instead of "Age10yr2==2".
>
> Hope that's clear..
> Thanks,
> Roger.
>
> . label list age10yr2
> age10yr2:
>            1 16-24
>            2 25-34
>            3 35-44
>            4 45-54
>            5 55-64
>            6 65-74
>
> . xi: logistic siweekT2 i.age10yr2
> i.age10yr2        _Iage10yr2_1-6      (naturally coded;
> _Iage10yr2_1
> omitted)
>
> Logit estimates                                   Number of obs   =
> 2406
>                                                   LR chi2(5)      =
> 1.02
>                                                   Prob > chi2     =
> 0.9609
> Log likelihood = -283.87549                       Pseudo R2       =
> 0.0018
>
> ------------------------------------------------------------
> ----------------
>     siweekT2 | Odds Ratio   Std. Err.      z    P>|z|
> [95% Conf.
> Interval]
> -------------+----------------------------------------------
> ---------------
> ---
> _Iage10yr2_2 |   1.241561   .7320912     0.37   0.714     .3908894
> 3.943504
> _Iage10yr2_3 |    1.35575   .7829916     0.53   0.598     .4371014
> 4.20511
> _Iage10yr2_4 |   1.550725   .8883524     0.77   0.444     .5045602
> 4.766025
> _Iage10yr2_5 |   1.461749   .8738824     0.64   0.525     .4528932
> 4.717909
> _Iage10yr2_6 |   1.632203   .9917213     0.81   0.420     .4961204
> 5.369842
> ------------------------------------------------------------
> ---------------
> ---
>
> . describe _I*
>
>               storage  display     value
> variable name   type   format      label      variable label
> ------------------------------------------------------------
> ---------------
> ----
> _Iage10yr2_2    byte   %8.0g                  age10yr2==2
> _Iage10yr2_3    byte   %8.0g                  age10yr2==3
> _Iage10yr2_4    byte   %8.0g                  age10yr2==4
> _Iage10yr2_5    byte   %8.0g                  age10yr2==5
> _Iage10yr2_6    byte   %8.0g                  age10yr2==6
>
> . reformat, eform
>
> LOGISTIC  formatted output
>
> Outcome variable: siweekT2 (Suicidal in week before T2), n=2406
> ------------------------------------------------------------
> ----------------
> Covariate            Odds Ratio  Std. Err.      P>|z|  (95%
> Conf. Interval)
> ------------------------------------------------------------
> ----------------
> Age10yr2==2
>   per unit                1.242      0.732      0.714
> (0.391 to 3.944)
> Age10yr2==3
>   per unit                1.356      0.783      0.598
> (0.437 to 4.205)
> Age10yr2==4
>   per unit                1.551      0.888      0.444
> (0.505 to 4.766)
> Age10yr2==5
>   per unit                1.462      0.874      0.525
> (0.453 to 4.718)
> Age10yr2==6
>   per unit                1.632      0.992      0.420
> (0.496 to 5.370)
> ------------------------------------------------------------
> ----------------
>
> . outreg using test.out
>
> . type test.out
>         Suicidal in week before T2
> age10yr2==2     1.242
>         (0.37)
> age10yr2==3     1.356
>         (0.53)
> age10yr2==4     1.551
>         (0.77)
> age10yr2==5     1.462
>         (0.64)
> age10yr2==6     1.632
>         (0.81)
> Observations    2406
> Absolute value of z statistics in parentheses
> * significant at 5%; ** significant at 1%

I don't know a way to do this except directly:

forval i = 2/6 {
	local label : label (age10yr2) `i'
	label var _I_age10yr2_`i' "`label'"
}

Once learned, you can modify according to
taste, e.g.

forval i = 2/6 {
	local label : label (age10yr2) `i'
	label var _I_age10yr2_`i' "age `label'"
}


Nick
n.j.cox@durham.ac.uk

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