| pike65 {mixdist} | R Documentation |
Length-Frequency Data for Heming Lake Pike
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)