"Patrick Sturgis" <[email protected]>
> This is a repeat of a message I posted toward the end of last year, which
> Nick Cox kindly helped me to resolve. However, the resolution was only
> partial as it fixed the bug in my code but I still seem to have a problem
> with running the same file successfully in version 8 (it works fine in 7).
> Here is the code:
>
> program define alphawithin
> version 8.0
> if "`1'" == "?" {
> global S_1 "alphawithin"
> exit
> }
> tempname y
> alpha bef*
> scalar `y' = r(alpha)
> alpha aft*
> post `1' (`r(alpha)'-`y')
> end
>
> When I run this with: bstrap alphawithin, reps(10)
>
> I get the following error message:
>
> command -> alphawithin
> error when command executed on original dataset
> under version 8 control
> r(198);
The syntax for -bstrap- has changed from Stata 7 to Stata 8. In Stata 8,
-bstrap- is a synonym for -bootstrap-. To get -bstrap- to behave like it does
in Stata 7, use the -version- command:
. version 7: bstrap alphawithin, reps(10)
To use the modern -bootstrap- syntax, try the following modified version of
-alphawithin-
program myalpha, rclass
version 8.2
tempname y
alpha bef*
scalar `y' = r(alpha)
alpha aft*
return scalar diff = r(alpha) - `y'
end
. bootstrap "myalpha" alphawithin=r(diff), reps(10)
For more details on -bootstrap-, see [R] bootstrap.
--Jeff
[email protected]
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