newdata.## S3 method for class 'lm':
forecast(object, newdata, level=c(80,95), fan=FALSE, ...)lm". Usually the result of a call to lm.predict.lm().forecast".
The function summary is used to obtain and print a summary of the
results, while the function plot produces a plot of the forecasts and prediction intervals.
The generic accessor functions fitted.values and residuals extract useful features of
the value returned by forecast.lm.
An object of class "forecast" is a list containing at least the following elements:object itself or the time series used to create the model stored as object).forecast.lm produces predicted values, obtained by evaluating the regression function in newdata. It is largely a wrapper to predict.lm and returns the output in the form of a forecast object. If the original data are time series, the function will make the forecasts time series with the appropriate parameters.predict.lm, lm.