aphids

The <code>aphids</code> data frame has 51 rows and 2 columns.
These correspond to 51 independent experiments in which varying
numbers of aphids were released in a flight chamber containing
12 infected and 69 healthy tobacco plants.  The resulting number
of infected plants was recorded.

datasets

Fits mixtures of (possibly multivariate) regressions
	(which has been described as doing ANCOVA when you don't
	know the levels).

Rolf Turner

mixreg

Functions to fit mixtures of regressions.

aphids function

These data appear courtesy of Gilles Boiteau and George Tai of the
Potato Research Centre, Agriculture and Agri-Food Canada,
Fredericton, New Brunswick.  Any published work using these data
should cite the paper given in the <b>References</b>.

source

After 24 hours, the flight chamber was fumigated to kill the aphids, and the
previously healthy plants were moved to a greenhouse and monitored to
detect symptoms of infection.  The number of plants displaying such
symptons was recorded.

aphids: Data on the rate of infection of tobacco plants by a virus spread by aphids.

Description

Usage

Arguments

source

DETERMINATION OF INFECTION

References