Calculate the entropy of a vector of probabilities, in bits.
Probabilities should sum to one.
Probabilities equalling zero will be ignored.

## Arguments

- ...
Numerics or numeric vector specifying probabilities of outcomes.

## Value

`Entropy()`

returns the entropy of the specified probabilities,
in bits.

## Examples

```
Entropy(1/2, 0, 1/2) # = 1
#> [1] 1
Entropy(rep(1/4, 4)) # = 2
#> [1] 2
```