performance0.RdA more flexible version of performance.
performance0(prediction.obj, measure, x.measure = "cutoff", ...)An object of class prediction.
Performance measure to use for the evaluation. A complete list
of the performance measures that are available for measure and
x.measure is given in the 'Details' section.
A second performance measure. If different from the default,
a two-dimensional curve, with x.measure taken to be the unit in
direction of the x axis, and measure to be the unit in direction of
the y axis, is created. This curve is parametrized with the cutoff.
Optional arguments (specific to individual performance measures).
An S4 object of class performance.
## computing a simple ROC curve (x-axis: fpr, y-axis: tpr)
library(ROCR)
data(ROCR.simple)
pred <- prediction( ROCR.simple$predictions, ROCR.simple$labels)
perf <- performance0(pred,"tpr","fpr")
#> Error: '.define.environments' is not an exported object from 'namespace:ROCR'
plot(perf)
#> Error in h(simpleError(msg, call)): error in evaluating the argument 'x' in selecting a method for function 'plot': object 'perf' not found