data.matrix {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`.

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