Tab works with character variables but logistic requires numeric variables; is this the problem here?
-----------------------------------
Thomas J. Steichen
[email protected]
-----------------------------------
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of moleps islon
Sent: Monday, May 04, 2009 12:16 PM
To: [email protected]
Subject: st: logistic problem with observation
Dear listers,
I encounter the following while doing a univariate logistic regression:
. logistic mors_30 sex
no observations
no observations
r(2000);
. tab sex
sex | Freq. Percent Cum.
------------+-----------------------------------
1 | 1,275 48.48 48.48
2 | 1,355 51.52 100.00
------------+-----------------------------------
Total | 2,630 100.00
. tab mors_30 sex
| sex
mors_30 | 1 2 | Total
-----------+----------------------+----------
0 | 1,245 1,325 | 2,570
1 | 30 30 | 60
-----------+----------------------+----------
Total | 1,275 1,355 | 2,630
. logit mors_30 sex
no observations
r(2000);
Other variables work beautifully.
Any ideas-why?
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