Make a Used-Aavailable Data Frame

Description

Make a used-available data frame from a presence-absence type data.

Usage

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makeUsedAvail(x, ...)

## Default S3 method:
makeUsedAvail(x, y, ...)

## S3 method for class 'formula'
makeUsedAvail(formula, data = parent.frame(), ...)

Arguments

x

a matrix or data frame.

y

a vector with 0/1 entries, 1s are taken as used observations.

formula

two sided model formula of the form y ~ x.

data

data.

...

other arguments.

Value

The function returns a data frame, where used and available portions of the input data are bound on top of each other, the first column refers to y, where used (1) and available (0) locations are indicated different from the input values. All locations in the input data are treated as available (0), while only nonzero observations in y are treated as used (1).

Author(s)

Peter Solymos

Examples

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(x <- data.frame(species=rep(1:0,each=4), var1=1:8, var2=11:18))
makeUsedAvail(species ~ var1 + var2, x)