infIndexPlot {car} | R Documentation |
Influence Index Plot
Description
Provides index plots of Cook's distances, leverages, Studentized residuals, and outlier significance levels for a regression object.
Usage
infIndexPlot(model, ...)
influenceIndexPlot(model, ...)
## S3 method for class 'lm'
infIndexPlot(model,
vars=c("Cook", "Studentized", "Bonf", "hat"),
main="Diagnostic Plots",
labels, id.method = "y",
id.n = if(id.method[1]=="identify") Inf else 0,
id.cex=1, id.col=palette()[1], grid=TRUE, ...)
Arguments
model |
A regression object of class |
vars |
All the quantities listed in this argument are plotted. Use |
main |
main title for graph |
id.method , labels , id.n , id.cex , id.col |
Arguments for the labelling of
points. The default is |
grid |
If TRUE, the default, a light-gray background grid is put on the graph |
... |
Arguments passed to |
Value
Used for its side effect of producing a graph. Produces four index plots of Cook's distance, Studentized Residuals, the corresponding Bonferroni p-values for outlier tests, and leverages.
Author(s)
Sanford Weisberg, sandy@umn.edu
References
Cook, R. D. and Weisberg, S. (1999) Applied Regression, Including Computing and Graphics. Wiley.
Fox, J. (2008) Applied Regression Analysis and Generalized Linear Models, Second Edition. Sage.
Fox, J. and Weisberg, S. (2011) An R Companion to Applied Regression, Second Edition, Sage.
Weisberg, S. (2014) Applied Linear Regression, Fourth Edition, Wiley.
See Also
cooks.distance
, rstudent
,
outlierTest
, hatvalues
Examples
m1 <- lm(prestige ~ income + education + type, Duncan)
influenceIndexPlot(m1)