Guillaume Frechette
> My problem ... the use of float doesn't seem to be the
> solution. Here's an example
> . gen foo = 1/3
> . gen bar = 1/3
> . gen baz = 1-foo-bar
> . tab baz
> baz | Freq. Percent Cum.
> ------------+-----------------------------------
> .3333333 | 850 100.00 100.00
> ------------+-----------------------------------
> Total | 850 100.00
> . tab baz if baz == float(1/3)
> no observations
> Can someone tell me how to get Stata to know to recognize baz as
equal to
> 1/3?
Joseph Coveney suggested the use of a tolerance.
I'm sure he would agree readily that that's an
awkward solution. Mine perhaps will not
seem better.
But my reaction is: what's the real problem here?
If it's that you have a group you want to
treat the same in some way -- and what that
group has in common is that (say) -baz- has
the same value of some variable -- then
one good way to do it is to make sure
that you have a categorical variable
which can you deal with. For this I
recommend -egen, group()-. If Stata is
sometimes cryptic, elusive or puzzling
about what values exactly are (or are held as),
at least it will map the same values to the
same category.
Nick
n.j.cox@durham.ac.uk
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