new CrossEntropy()
The cross-entropy cost function for a single pair of values.
wiki: http://en.wikipedia.org/wiki/Cross_entropy
- Implements:
- Source:
Methods
delta(input, output, target) → {number}
TODO doc CostFunction.delta
Parameters:
| Name | Type | Description |
|---|---|---|
input |
array | the array of input values |
output |
number | the actual output value |
target |
number | the desired output value |
- Implements:
- Source:
Returns:
the error delta associated with the output and target
- Type
- number
fn(output, target) → {number}
TODO doc CostFunction.fn
Parameters:
| Name | Type | Description |
|---|---|---|
output |
number | the actual output value |
target |
number | the desired output value |
- Implements:
- Source:
Returns:
the cost associated with the output and target
- Type
- number