[R] test for bimodality

M. Edward Borasky znmeb at aracnet.com
Mon May 14 02:16:06 CEST 2001

One method I know of uses the bootstrap, and is described in "An
Introduction to the Bootstrap" by B. Efron and R. Tibshirani, 1993, Chapman
and Hall. And the contributed package "bootstrap" contains code and data for
this book, so I presume (without actually having looked at the package :-)
that what you need is there.
M. Edward (Ed) Borasky, Chief Scientist, Borasky Research
mailto:znmeb at borasky-research.com
mailto:znmeb at aracnet.com

If there's nothing to astrology, how come so many famous men were born on
-----Original Message-----
From: owner-r-help at stat.math.ethz.ch
[mailto:owner-r-help at stat.math.ethz.ch]On Behalf Of David White
Sent: Sunday, May 13, 2001 11:56 AM
To: r-help
Subject: [R] test for bimodality

Dear R users,

I'm looking for a test of bimodality in order to make some decisions about
how to procede with an analysis algorithm. I have not come across any such
tests in my readings and discussions apart from the Rao which appears to be
applicable to cyclic data.

The data I'm interested in characterizing as uni- or bimodal  are frequency
x amplitude spectra of consonant speech sounds, where the spectrum, a line
graph is treated as a frequency distribution.

Thanks in advance for your input.


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