| predict {stats} | R Documentation |
predict is a generic function for predictions from the results of
various model fitting functions. The function invokes particular
methods which depend on the class of
the first argument.
predict (object, ...)
object |
a model object for which prediction is desired. |
... |
additional arguments affecting the predictions produced. |
Most prediction methods which similar to fitting linear models have an
argument newdata specifiying the explanatory variables to be
used for prediction. Some considerable attempts are made to match up
the columns in newdata to those used for fitting, for example
that they are of comparable types and that any factors have the same
level set in the same order (or can be transformed to be so).
Time series prediction methods have an argument n.ahead
specifying how many time steps ahead to predict.
Many methods have a logical argument se.fit saying if standard
errors are to returned.
The form of the value returned by predict depends on the
class of its argument. See the documentation of the
particular methods for details of what is produced by that method.
Chambers, J. M. and Hastie, T. J. (1992) Statistical Models in S. Wadsworth & Brooks/Cole.
predict.glm,
predict.lm,
predict.loess,
predict.nls,
predict.poly,
predict.princomp,
predict.smooth.spline.
For time-series prediction,
predict.ar,
predict.Arima,
predict.arima0,
predict.HoltWinters,
predict.StructTS.
## All the "predict" methods found
## NB most of the methods in the standard packages are hidden.
for(fn in methods("predict"))
try({
f <- eval(substitute(getAnywhere(fn)$objs[[1]], list(fn = fn)))
cat(fn, ":\n\t", deparse(args(f)), "\n")
}, silent = TRUE)