fit_dist_gamma {ABCp2} | R Documentation |
Fit Offspring Distribution to the Gamma Distribution
Description
This function fits offspring data to a special case of the gamma distribution, in which zero values of offspring are excluded and all values are rounded to a whole number, and tests the goodness of fit using the chi-squared test.
Usage
fit_dist_gamma(dist)
Arguments
dist |
a numeric vector of data values for number of offspring per dam. |
Value
estimate |
Shape and rate parameters estimated from the supplied distribution. |
sd |
Standard deviation of the shape and rate estimates. |
vcov |
Variance/covariance matrix of the shape and rate estimates. |
loglik |
the log-likelihood of the shape and rate estimates. |
n |
The number of observations. |
statistic |
The chi-squared test statistic. |
parameter |
Degrees of freedom for the chi-squared test. |
p.value |
P-value for the chi-squared test. |
data_gamma |
Vector of values generated from a special case of the gamma distribution. |
Author(s)
M. Catherine Duryea, Andrew D. Kern, Robert M. Cox, and Ryan Calsbeek
Examples
#Fit the Shape and Rate parameters to a distribution of offspring.
#Test the goodness of fit.
data(fungus)
fungus_fit<-fit_dist_gamma(fungus$Total_Offspring)
fungus_fit$fit_gamma
fungus_fit$chi_gamma
hist(fungus_fit$data_gamma)