Description Usage Arguments Details Value Note References See Also

View source: R/predict.censReg.R

Predicts values from a censored regression object: method for "censReg" object.

1 2 3 4 5 |

`object` |
the output from |

`newdata` |
an optional data frame in for predictions.
If omitted, the observations from |

`type` |
the type of predicted value. To get predictions on the original scale of the response, use "response." To get predictions on the transformed scale of the response, use "link." To get the mean predictions for log-normal data, use "mean." |

`se.fit` |
the type of standard errors of the predicted value to include in the result. |

`interval` |
type type of interval calculation. See |

`level` |
the confidence or prediction interval. |

`na.action` |
function determining what should be done with missing values in newdata. The default is to predict NA. |

`...` |
further arguments passed to or from other methods. |

Some combinations of `type`

and `se.fit`

and `interval`

are not possible, depending on the distribution of the model. If `type`

is "link" or the distribution is normal, then all combinations are possible.
the value for type may be "mean" only if the distribution is log-normal, and
the only additional option is "estimate" for `se.fit`

. For either log-normal
or common log distributions, if the `type`

is "response," then the options for
`se.fit`

and `interval`

ae "none" or "prediction."

A vector of predictions or a matrix of predictions and the other selected statistics. In contrast with other regression predict functions, a list of fitted values and standard errors is never returned.

The predicted value for `type`

= "mean" uses the adjusted maximum
likelihood method for bias correction described by Cohn (1988) and Cohn and
others (1992). that method will give sligthly different predicted values than
the minimum variance unbiased estimate (MVUE) described by Bradu and Mundlak (1970).

Bradu, D., and Mundlak, Y. 1979, Estimation in lognormal linear models:
Journal of the American Statistical Association, v. 65, no. 39, p. 198–211.

Cohn, T.A., 1988, Adjusted maximum likelihood estimation of the moments of lognormal
populations form type I censored samples: U.S. Geological Survey Open-File Report 88-350, 34 p.

Cohn, T.A., Gilroy, E.J., and Baier, W.G., 1992, Estimating fluvial transport of trace
constituents using a regression model with data subject to censoring: Proceeding of the
Joint Statistical Meeting, Boston, August 9–13, 1992, p. 142–151.

USGS-R/smwrQW documentation built on Sept. 22, 2018, 4:35 a.m.

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