preseqR.nonreplace.sampling {preseqR}

Sampling

Description

Generating a histogram by subsampling without replacement.

Usage

  preseqR.nonreplace.sampling(n, size)

Arguments

n

A two-column matrix. The first column is the frequency j = 1,2,\dots; and the second column is N_j, the number of species represented exactly j times in the initial sample. The first column must be sorted in an ascending order.

size

An positive integer representing the size of the subsample.

Details

preseqR.nonreplace.sampling generates a subsample by sampling the initial sample without replacement. sample in R is used to implement the function. We wrap up this function in such a way that both the input and the output are histograms.

Value

A two-column matrix as a subsample. The first column is the frequency j = 1,2,\dots; and the second column is N_j, the number of species represented j times in the subsample.

Author(s)

Chao Deng

References

https://stat.ethz.ch/R-manual/R-patched/library/base/html/sample.html

Examples

## load library
library(preseqR)
## import data
data(FisherButterfly)
## generate a subsample of size 1000.
preseqR.nonreplace.sampling(n=FisherButterfly, size=1000)