| naresid {stats} | R Documentation |
Use missing value information to adjust residuals and predictions.
naresid(omit, x, ...) napredict(omit, x, ...)
omit |
an object produced by an na.action function,
typically the "na.action" attribute of the result of
na.omit or na.exclude. |
x |
a vector, data frame, or matrix to be adjusted based upon the missing value information. |
... |
further arguments passed to or from other methods. |
These are utility functions used to allow predict and
resid methods for modelling functions to compensate for
the removal of NAs in the fitting process. They are used by
the default, "lm" and "glm" methods, and by further
methods in packages MASS, rpart and survival.
The default methods do nothing. The default method for the na.exclude
action is to pad the object with NAs in the correct positions to
have the same number of rows as the original data frame.
Currently naresid and napredict are identical, but
future methods need not be. naresid is used for residuals, and
napredict for fitted values and predictions.
These return a similar object to x.
Packages rpart and survival5 used to contain versions of
these functions that had an na.omit action equivalent to that
now used for na.exclude.