Barplot of information values to compare dicriminator of the transformed variables.
Usage
# S3 method for woe
plot(x, type = c("IV", "woes"), ...)
Arguments
x
An object of class woe.
type
Character to specify the plot type, see below. Either "IV" (default) or "woes".
…
Further arguments to be passed to the barplot function.
Value
No value is returned.
Details
For type=="IV" a barplot of information values for all transformed variables.
A thumb rule of interpretation is that Values above 0.3 are considered as strongly discrimative where values below 0.02 are considered to characterize unpredictive variables.
For type=="woes" for each variable the relative frequencies of all transformed levels are plotted.
References
Good, I. (1950): Probability and the Weighting of Evidences. Charles Griffin, London.
Kullback, S. (1959): Information Theory and Statistics. Wiley, New York.