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DescTools (version 0.99.19)

as.matrix.xtabs: Convert xtabs To matrix

Description

This function converts an xtabs object to a matrix.

Usage

"as.matrix"(x, ...)

Arguments

x
an object of class xtabs

...
additional arguments to be passed to or from methods.

Details

xtabs is indeed already a matrix, but won't be converted to a pure matrix by as.matrix.default function, as its classes definition will remain unchanged. Some functions expecting a pure matrix may fail, when fed with a xtabs object. as.matrix.xtabs will kill the classes and the call attribute. Note that unclass would as well discard the classes xtabs and table, but retain the "call" attribute.

See Also

as.matrix, xtabs, unclass

Examples

Run this code
tab <- xtabs( ~ driver + operator, data=d.pizza)

str(tab)
class(tab)

str(as.matrix(tab))
class(as.matrix(tab))

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