Compute or plot the margin of predictions from a RRF classifier.
Usage
# S3 method for RRF
margin(x, ...)
# S3 method for default
margin(x, observed, ...)
# S3 method for margin
plot(x, sort=TRUE, ...)
Arguments
x
an object of class RRF, whose
type is not regression, or a matrix of predicted
probabilities, one column per class and one row per observation.
For the plot method, x should be an object returned by
margin.
observed
the true response corresponding to the data in x.
sort
Should the data be sorted by their class labels?
...
other graphical parameters to be passed to plot.default.
Value
For margin, the margin of observations from the
RRF classifier (or whatever classifier that
produced the predicted probability matrix given to margin).
The margin of a data point is defined as the proportion of votes for
the correct class minus maximum proportion of votes for the other
classes. Thus under majority votes, positive margin means correct
classification, and vice versa.