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from copy import copy
import numpy as np
from scipy.signal import decimate
from public import public
from .trace import Trace
@public
def downsample_average(trace: Trace, factor: int = 2) -> Trace:
resized = np.resize(trace.samples, len(trace.samples) - (len(trace.samples) % factor))
result_samples = resized.reshape(-1, factor).mean(axis=1).astype(trace.samples.dtype)
return Trace(copy(trace.title), copy(trace.data), result_samples)
@public
def downsample_pick(trace: Trace, factor: int = 2, offset: int = 0) -> Trace:
result_samples = trace.samples[offset::factor].copy()
return Trace(copy(trace.title), copy(trace.data), result_samples)
@public
def downsample_decimate(trace: Trace, factor: int = 2) -> Trace:
result_samples = decimate(trace.samples, factor)
return Trace(copy(trace.title), copy(trace.data), result_samples)
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