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 internal codes.

Usage:

     data.matrix(frame)

Arguments:

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

References:

     Chambers, J. M. (1992) _Data for models._ Chapter 3 of
     _Statistical Models in S_ eds J. M. Chambers and T. J. Hastie,
     Wadsworth & Brooks/Cole.

See Also:

     'as.matrix', 'data.frame', 'matrix'.

