ols_plot_resid_stud {olsrr} | R Documentation |
Studentized residual plot
Description
Graph for identifying outliers.
Usage
ols_plot_resid_stud(model, threshold = NULL, print_plot = TRUE)
Arguments
model |
An object of class |
threshold |
Threshold for detecting outliers. Default is 3. |
print_plot |
logical; if |
Details
Studentized deleted residuals (or externally studentized residuals) is the deleted residual divided by its estimated standard deviation. Studentized residuals are going to be more effective for detecting outlying Y observations than standardized residuals. If an observation has an externally studentized residual that is larger than 3 (in absolute value) we can call it an outlier.
Value
ols_plot_resid_stud
returns a list containing the
following components:
outliers |
a |
for classifying an observation as an outlier
threshold |
|
See Also
Examples
model <- lm(mpg ~ disp + hp + wt, data = mtcars)
ols_plot_resid_stud(model)
ols_plot_resid_stud(model, threshold = 2)