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Last data update: 2014.03.03

R: Randomly input missing data points

missing.data

R Documentation

Randomly input missing data points

Description

Randomly replaces a set percentage of data points in a matrix of morphometric measurements with NA to simulate missing data. This is function RMD from Brown et al. (In Press).

Usage

missing.data(x, remperc)

Arguments

`x`	A n X m matrix of morphometric data with n specimens and m variables
`remperc`	The percentage of data to be removed from the matrix, expressed as a decimal (ex: 30 percent would be entered as 0.3)

Value

Returns a n X m matrix of morphometric data with missing variables input as NA

Author(s)

J. Arbour and C. Brown

References

Brown, C., Arbour, J. and Jackson, D. 2012. Testing of the Effect of Missing Data Estimation and Distribution in Morphometric Multivariate Data Analyses. Systematic Biology 61(6):941-954.