[R] bcanon bug???
Bruno Giordano
Bruno.Giordano at ircam.fr
Tue Apr 27 18:11:33 CEST 2004
Hallo,
I'm using bcanon to get bootstrap confidence intervals.
I need to modify the default confidence levels
(alpha=c(0.025, 0.05, 0.1, 0.16, 0.84, 0.9, 0.95, 0.975)),
adding two more extreme values:
alpha=c((0.05/x),0.025, 0.05, 0.1, 0.16, 0.84, 0.9, 0.95, 0.975,1-(0.05/x)))
trying to adapt for x/2 comparisons with the bootstraped statistic.
The function seems to work ok, but in some cases the bootstrap estimates for
the
highest confidence level are obviously wrong:
0.05/x -1.33318711781158
0.025 -1.09386961626344
0.05 -0.868768454819694
0.1 -0.652649120212949
0.16 0.0453058935697044
0.84 0.104645679223495
0.9 0.213385388775905
0.95 0.368838243723381
0.975 0.615868703042345
1-0.05/x -1.33318711781158
where the estimate for the highest confidence level is simply the copy of
that for the lowest.
Did someone experience a similar problem?
I guess I should do some debugging on the bcanon code.
Thanks
Bruno
~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Bruno L. Giordano - Ph. D. student
Dipartimento di Psicologia Generale
Via Venezia 8 - 35131 Padova, Italy
currently hosted by:
Equipe Perception et Cognition Musicales
Ircam-CNRS (UMR 9912)
1 place Igor-Stravinsky
F-75004 Paris, France
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