Description Usage Arguments Value See Also Examples
Symmetrical uncertainty (SU) is the product of a normalization of
the information gain (IG
) with
respect to entropy. SU(X,Y) is a value in the range [0,1], where
SU(X,Y) = 0 if X and Y are totally independent and
SU(X,Y) = 1 if X and Y are totally dependent.
1 2 3 | symmetrical_uncertainty(x, y)
SU(x, y)
|
x |
A factor as the represented categorical variable. |
y |
A factor as the represented categorical variable. |
Symmetrical uncertainty estimation based on Sannon
entropy. The result is round
ed to 7 decimal places.
1 2 3 4 5 6 7 8 9 | # completely predictable
symmetrical_uncertainty(factor(c(0,1,0,1)), factor(c(0,1,0,1)))
# XOR factor variables
symmetrical_uncertainty(factor(c(0,0,1,1)), factor(c(0,1,1,0)))
symmetrical_uncertainty(factor(c(0,1,0,1)), factor(c(0,1,1,0)))
## Not run:
symmetrical_uncertainty(c(0,1,0,1), c(0,1,1,0))
## End(Not run)
|
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