Help System (web edition)

  Residuals and predicted values
The residuals and the predicted values of the regression model may
be obtained by activating variables in the data set by R,F or G
where
  R is a mask for the residuals,
  F is a mask for the predicted values of the model function and
  G is a mask for the values of the regressand (function).
The VARS and MASK specifications may be used for these activations
as well.
  S = more on extra specifications in ESTIMATE