residuals.arbor
Residuals from an Arbor Object
Description
Returns a vector of residuals from an arbor object.
Usage
residuals.arbor(object, type = c("usual", "pearson", "deviance"))
Arguments
| object |
a fitted model object of class arbor. This model is assumed to be the result
of a function that produces an object with the same named
components as that returned by the arbor function.
|
| type |
indicates a method of residual for a classification tree. (No distinction
is made for methods "anova", "poisson", or "exp".) Can be one of the following
types of residuals.
- "usual": misclassification errors.
- "pearson": the sum of the observed minus fitted squared over fitted.
- "deviance": minus twice logarithm of fitted.
|
Value
returns a vector of residuals of type type from a fitted arbor object.
Examples
library("arbor")
data(solder, package = "Sdatasets")
fit <- arbor(skips ~ Opening + Solder + Mask + PadType + Panel,
data = solder, method = 'anova')
pr <- data.frame(predict(fit), residuals(fit))
pr[880:900,]