st: marginsplot is acting differently

[Richard Williams <richardwilliams.ndu@gmail.com>]

-marginsplot- seems to be acting differently than it was a few months 
ago, and the change is not for the better. Here is my code:
webuse nhanes2f, clear
logit diabetes i.black i.female age, nolog
margins, dydx(black female) at(age=(20 30 40 50 60 70)) vsquish
marginsplot, noci

When I ran this a few months ago, I got a line for 1.black and 
1.female, which is what I want. But, when I run it now, I also get 
lines for 0b.black and 0b.female. The latter are worthless because 
they are simply the same as the X axis, i.e. the effects are always 0.
I am guessing this is some sort of bug and if so I hope it will be 
fixed soon. But in the meantime, does anybody know an easy way to get 
only the two lines that I want? I can go into the graph editor and 
hide things but that is a pain.
I have a feeling this isn't the best time to ask a question, but I'll 
keep my fingers crossed that somebody is working late before taking 
some richly deserved time off for the New Year!
-------------------------------------------
Richard Williams, Notre Dame Dept of Sociology
OFFICE: (574)631-6668, (574)631-6463
HOME:   (574)289-5227
EMAIL:  Richard.A.Williams.5@ND.Edu
WWW:    http://www.nd.edu/~rwilliam

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