Take a Sample from a Data Set or Importer Object

Description

These methods are a convenience short-cuts to take samples from data.set or importer objects. They result in a data set (data.set object) the rows of which are a sample of the complete object.

Usage

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## S4 method for signature 'data.set'
sample(x, size, replace = FALSE, prob = NULL)
## S4 method for signature 'importer'
sample(x, size, replace = FALSE, prob = NULL)

Arguments

x

a data frame.

size

an (optional) numerical value, the sample size, defaults to the total number of rows of x.

replace

a logical value, determines whether sampling takes place with or without replacement.

prob

a vector of sampling probabities or NULL.

Value

A data frame.

Examples

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for(.i in 1:4)
  print(sample(iris,5))