Description Usage Arguments Value Author(s) References See Also Examples

Calculates the condition number with the intercept included, following Belsley, Kuh and Welsch (1980).

1 | ```
collin.fnc(data, colvector)
``` |

`data` |
A data frame. |

`colvector` |
A vector with the column numbers in the data frame for which the collinearity is to be assessed. Only numeric predictors allowed. |

A list with components

`svd` |
Singular value decomposition |

`cindex` |
Condition indices |

`cnumber` |
The condition number |

`pi` |
The phi matrix |

F. J. Tweedie

Belsley, D. A. and Kuh, E. and Welsch, R. E. (1980) *Regression
Diagnostics. Identifying Influential Data and Sources of Collinearity*, Wiley
Series in Probability and Mathematical Statistics, New York.

1 2 3 4 5 | ```
## Not run:
data(english)
collin.fnc(english[english$AgeSubj=="young",], 7:29)$cnumber
## End(Not run)
``` |

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