Sigmoidal#
S shaped nonliearity kernel with output values ranging from -1 to 1.
Parameters#
| # | Name | Default | Type | Description |
|---|---|---|---|---|
| 1 | gamma | null | float | The kernel coefficient. |
| 2 | coef0 | 0. | float | The independent term. |
Example#
use Rubix\ML\Kernels\SVM\Sigmoidal;
$kernel = new Sigmoidal(null, 0.);