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Allow readonly arrays for higuchi_fd #13

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merged 1 commit into from
Nov 20, 2021
Merged

Allow readonly arrays for higuchi_fd #13

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4 changes: 2 additions & 2 deletions antropy/fractal.py
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Original file line number Diff line number Diff line change
@@ -1,6 +1,6 @@
"""Fractal functions"""
import numpy as np
from numba import jit
from numba import jit, types
from math import log, floor

from .entropy import num_zerocross
Expand Down Expand Up @@ -194,7 +194,7 @@ def katz_fd(x, axis=-1):
return kfd


@jit('float64(float64[:], int32)')
@jit((types.Array(types.float64, 1, 'C', readonly=True), types.int32))
def _higuchi_fd(x, kmax):
"""Utility function for `higuchi_fd`.
"""
Expand Down
4 changes: 4 additions & 0 deletions antropy/tests/test_fractal.py
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Original file line number Diff line number Diff line change
Expand Up @@ -44,6 +44,10 @@ def test_higuchi_fd(self):
"""
# Compare with MNE-features
self.assertEqual(np.round(higuchi_fd(RANDOM_TS), 8), 1.9914198)
# Check if readonly arrays can be processed as well
x = RANDOM_TS.copy().astype(np.float64)
x.flags.writeable = False
self.assertEqual(np.round(higuchi_fd(x), 8), 1.9914198)
higuchi_fd(list(RANDOM_TS), kmax=20)

def test_detrended_fluctuation(self):
Expand Down