ols_press {olsrr}

PRESS

Description

PRESS (prediction sum of squares) tells you how well the model will predict new data.

Usage

ols_press(model)

Arguments

model

An object of class lm.

Details

The prediction sum of squares (PRESS) is the sum of squares of the prediction error. Each fitted to obtain the predicted value for the ith observation. Use PRESS to assess your model's predictive ability. Usually, the smaller the PRESS value, the better the model's predictive ability.

Value

Predicted sum of squares of the model.

References

Kutner, MH, Nachtscheim CJ, Neter J and Li W., 2004, Applied Linear Statistical Models (5th edition). Chicago, IL., McGraw Hill/Irwin.

See Also

Other influence measures: ols_hadi(), ols_leverage(), ols_pred_rsq()

Examples

model <- lm(mpg ~ disp + hp + wt + qsec, data = mtcars)
ols_press(model)