Source code for ezmsg.sigproc.math.scale

import ezmsg.core as ez
from ezmsg.util.messages.axisarray import AxisArray
from ezmsg.util.messages.util import replace

from ..base import BaseTransformer, BaseTransformerUnit



[docs]
class ScaleSettings(ez.Settings):
    scale: float = 1.0
    """Factor by which to scale the data magnitude."""




[docs]
class ScaleTransformer(BaseTransformer[ScaleSettings, AxisArray, AxisArray]):
    def _process(self, message: AxisArray) -> AxisArray:
        return replace(message, data=self.settings.scale * message.data)




[docs]
class Scale(BaseTransformerUnit[ScaleSettings, AxisArray, AxisArray, ScaleTransformer]):
    SETTINGS = ScaleSettings




[docs]
def scale(scale: float = 1.0) -> ScaleTransformer:
    """
    Scale the data by a constant factor.

    Args:
        scale: Factor by which to scale the data magnitude.

    Returns: :obj:`ScaleTransformer`

    """
    return ScaleTransformer(ScaleSettings(scale=scale))