dictionary | R Documentation |
Builds the woe dictionary of a set of predictor variables upon a given binary outcome. Convenient to make a woe version of the given set of predictor variables and also to allow one to tweak some woe values by hand.
dictionary(.data, outcome, ..., Laplace = 1e-06)
.data |
A tbl. The data.frame where the variables come from. |
outcome |
The bare name of the outcome variable with exactly 2 distinct values. |
... |
bare names of predictor variables or selectors accepted by |
Laplace |
Default to 1e-6. The |
You can pass a custom dictionary to step_woe()
. It must have the exactly
the same structure of the output of dictionary()
. One easy way to do this
is by tweaking an output returned from it.
a tibble with summaries and woe for every given predictor variable stacked up.
Kullback, S. (1959). Information Theory and Statistics. Wiley, New York.
Hastie, T., Tibshirani, R. and Friedman, J. (1986). Elements of Statistical Learning, Second Edition, Springer, 2009.
Good, I. J. (1985), "Weight of evidence: A brief survey", Bayesian Statistics, 2, pp.249-270.
mtcars %>% dictionary("am", cyl, gear:carb)
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