Source code for crappy.modifier.median

# coding: utf-8

import numpy as np
from typing import Union

from .modifier import Modifier


[docs]class Median(Modifier): """Median filter. Returns: The median value every :attr:`npoints` point of data. """
[docs] def __init__(self, npoints: int = 100) -> None: """Sets the instance attributes. Args: npoints (:obj:`int`): The number of points it takes to return `1` value. """ Modifier.__init__(self) self.npoints = npoints
def evaluate(self, data: dict) -> Union[dict, None]: if not hasattr(self, "last"): self.last = dict(data) for k in self.last: self.last[k] = [self.last[k]] return data r = {} for k in data: self.last[k].append(data[k]) if len(self.last[k]) == self.npoints: try: r[k] = np.median(self.last[k]) except TypeError: r[k] = self.last[k][-1] elif len(self.last[k]) > self.npoints: self.last[k] = [] if r: return r