predict.addreg.smooth {addreg}R Documentation

Predict Method for addreg.smooth Fits


Obtains predictions from a fitted addreg.smooth object.


## S3 method for class 'addreg.smooth'
predict(object, newdata = NULL, type = c("link", "response", "terms"), 
        terms = NULL, na.action = na.pass, ...)



a fitted object of class inheriting from "addreg.smooth".


optionally, a data frame in which to look for variables with which to predict. If omitted, the fitted linear predictors are used.


the type of prediction required. The default is on the scale of the linear predictors; the alternative "response" is on the scale of the response variable. The "terms" option returns a matrix giving the fitted values of each term in the model formula on the linear predictor scale.

The value of this argument can be abbreviated.


with type = "terms" by default all terms are returned. A character vector specifies which terms are to be returned.


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.


predict.addreg.smooth constructs the underlying basis functions for smooth variables in newdata and runs predict.addreg to obtain predictions. Note that if values of smooth covariates in newdata are outside the covariate space of object, an error will be returned.

If newdata is omitted, the predictions are based on the data used for the fit. In that case how cases with missing values in the original fit are treated is determined by the na.action argument of that fit. If na.action = na.omit, omitted cases will not appear in the residuals; if na.action = na.exclude they will appear, with residual value NA. See also napredict.


A vector or matrix of predictions. For type = "terms", this is a matrix with a column per term, and may have an attribute "constant".


Variables are first looked for in newdata and then searched for in the usual way (which will include the environment of the formula used in the fit). A warning will be given if the variables found are not of the same length as those in newdata if it was supplied.


Mark W. Donoghoe

See Also

addreg.smooth, predict.addreg

predict.glm for the equivalent method for models fit using glm.


## For an example, see example(addreg.smooth)

[Package addreg version 3.0 Index]