Antoine Terracol <[email protected]> is using an -if- condition
with -histogram- that depends on an -r()- result, but -histogram- isn't
behaving as expected:
> I am puzzled by the fact that -histogram- does not seem to properly
> select cases based on a comparison with a saved result after -summarize-:
>
> /**********************/
> clear
> cap graph drop _all
> set obs 1000
> g x=exp(rnormal())
> su x, de
> local p95=r(p95)
> di r(p95)
> hist x if x<r(p95), name(ha)
> hist x if x<`p95', name(hb)
> hist x, name(hc)
> /**********************/
>
> the first histogram (with the -if- statement and the reference to
> r(p95)) is identical to the last histogram (without the -if- statement).
> When r(p95) is saved to a local macro which is then used in an -if-
> statement, it works fine (second graph).
>
> Now, I have not tried all types of graphs, but -kdensity- seems to
> behave as expected:
>
> /**********************/
> clear
> cap graph drop _all
> set obs 1000
> g x=exp(rnormal())
> su x, de
> local p95=r(p95)
> di r(p95)
> kdensity x if x<r(p95), name(ka)
> kdensity x if x<`p95', name(kb)
> kdensity x, name(kc)
> /************************/
This is unintended behavior and will be fixed in a future update to Stata.
--Jeff
[email protected]
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