se.jack {asbio}R Documentation

Jackknife standard error from a set of pseudovalues

Description

Calculates the conventional jackknife standard error from a set of pseudovalues. The function se.jack provides Tukey's jackknife estimator. The function se.jack provides a measure associated with first order jackknife estimates of species richness (Heltsche and Forester 1983).

Usage


se.jack(x)


se.jack1(x)

Arguments

x

A numeric vector of pseudovalue, for instance from function pseudo.v.

Author(s)

Ken Aho

References

Heltshe, J. F., and N. E. Forrester (1983) Estimating species richness using the jackknife procedure. Biometrics 39: 1-12.

See Also

pseudo.v

Examples

trag <- c(59, 49, 75, 43, 94, 68, 77, 78, 63, 71, 31, 59, 53, 48, 65, 73, 50, 59, 50, 57)
p <- pseudo.v(trag, statistic = mean)
se.jack(p[,2])

[Package asbio version 1.7 Index]