sigmoid
| x : | Real (pass by const reference) |
| The value. | |
| min : | RealPos (pass by const reference) |
| The minimum value of the sigmoid function. | |
| max : | RealPos (pass by const reference) |
| The maximum value of the sigmoid function. | |
| mid : | Real (pass by const reference) |
| The middle of the sigmoid function. | |
| slope : | Real (pass by const reference) |
| The slope of the sigmoid function. |