data.matrix               package:base               R Documentation

Data Frame to Numeric Matrix

Description:

     Return the matrix obtained by converting all the variables in a
     data frame to numeric mode and then binding them together as the
     columns of a matrix.  Factors and ordered factors are replaced by
     their codes.

Usage:

     data.matrix(frame)

Arguments:

   frame: a data frame whose components are either logical vectors,
          factors or numeric vectors.

See Also:

     `as.matrix', `codes', `data.frame', `matrix'.

