Lambda Function#
Run a stateless lambda function over the samples in a dataset. The function receives three arguments - the sample to be transformed, its row offset in the dataset, and a user-defined outside context variable that can be used to hold state.
Note: If the transformation results in a change in dimensionality, the change must be consistent for each sample.
Interfaces: Transformer
Compatibility Depends on callback function
Parameters#
| # | Param | Default | Type | Description |
|---|---|---|---|---|
| 1 | callback | callable | The function to call over the samples in the dataset. | |
| 2 | context | null | mixed | The outside context that gets injected into the callback function on each call. |
Example#
use Rubix\ML\Transformers\LambdaFunction;
$callback = function (&$sample, $offset, $context) {
$sample[] = log1p($sample[3]);
};
$transformer = new LambdaFunction($callback, 'example context');
Additional Methods#
This transformer does not have any additional methods.