pike65: Length-Frequency Data for Heming Lake Pike

In mixdist: Finite Mixture Distribution Models

Description

The raw data pikeraw give the lengths of 523 pike (Esox lucius). We grouped the lengths over 25 intervals to obtain this length-frequency data.

The pike65 data frame has 25 rows and 2 columns.

Usage

data(pike65)

Format

This data frame contains the following columns:

length

the boundaries of grouping intervals.

freq

the frequencies of observation falling into each interval.

Source

Macdonald, P.D.M. and T.J. Pitcher (1979). Age-groups from size-frequency data: a versatile and efficient method of analysing distribution mixtures. Journal of the Fisheries Research Board of Canada 36, 987-1001.

References

Macdonald, P.D.M. (1987). Analysis of length-frequency distributions. In R.C. Summerfelt and G.E. Hall [editors], Age and Growth of Fish, Iowa State University Press, Ames, Iowa. pp 371-384.

http://www.math.mcmaster.ca/peter/mix/demex/expike.html

Examples

data(pike65)
data(pikepar)
plot.mixdata(pike65)
fit <- mix(pike65, pikepar, "lnorm", constr = mixconstr(consigma = "CCV"), emsteps = 3)
plot(fit)

Example output

mixdist documentation built on May 2, 2019, 3:34 p.m.