<commit_before>#!/usr/bin/env python
"""
Works through Oct2Py 3.9.0, Oct2Py 4.0.0-4.0.6 broken
"""
import oct2py
print(oct2py.__version__)

m=7
p=0.2

with oct2py.Oct2Py() as oc:
    oc.eval('pkg load signal')
    bmat = oc.fir1(m, p).squeeze()
# %% Python
import scipy.signal

bpy = scipy.signal.firwin(m+1, p)
# %% plot
import numpy as np
from matplotlib.pyplot import figure,show

wmat, hmat = scipy.signal.freqz(bmat)
wpy, hpy = scipy.signal.freqz(bpy)

hmat_db = 20*np.log10(abs(hmat))
hpy_db = 20 * np.log10(abs(hpy))

figure(1).clf()
ax = figure(1).subplots(2,1, sharex=True)
ax[0].set_title('FIR1() vs. firwin() frequency response')
ax[0].plot(wmat, hmat_db, label='Matlab')
ax[0].plot(wpy, hpy_db, label='Python')
ax[0].set_ylabel('Amplitude [dB]')
ax[0].grid(True)
ax[0].legend()

angmat = np.unwrap(np.angle(hmat))
angpy = np.unwrap(np.angle(hpy))
ax[1].plot(wmat, angmat, label='Matlab')
ax[1].plot(wpy, angpy, label='Python')
ax[1].set_ylabel('Angle (radians)')
ax[1].grid(True)
ax[1].set_xlabel('Frequency [rad/sample]')
ax[1].legend()

assert (hmat_db[:130] > -6).all()
assert (hpy_db[:130] > -6).all()

assert (hmat_db[278:] <-20).all()
assert (hpy_db[278:] <-20).all()
np.testing.assert_allclose(hpy_db, hmat_db, atol=10) # dB
# %% Savitsky-Golay
import numpy as np
k=3
n=5<commit_msg>tolerance for older version<commit_after>#!/usr/bin/env python
"""
Works through Oct2Py 3.9.0, Oct2Py 4.0.0-4.0.6 broken
"""
import oct2py
print(oct2py.__version__)

m=7
p=0.2

with oct2py.Oct2Py() as oc:
    oc.eval('pkg load signal')
    bmat = oc.fir1(m, p).squeeze()
# %% Python
import scipy.signal

bpy = scipy.signal.firwin(m+1, p)
# %% plot
import numpy as np
from matplotlib.pyplot import figure,show

wmat, hmat = scipy.signal.freqz(bmat)
wpy, hpy = scipy.signal.freqz(bpy)

hmat_db = 20*np.log10(abs(hmat))
hpy_db = 20 * np.log10(abs(hpy))

figure(1).clf()
ax = figure(1).subplots(2,1, sharex=True)
ax[0].set_title('FIR1() vs. firwin() frequency response')
ax[0].plot(wmat, hmat_db, label='Matlab')
ax[0].plot(wpy, hpy_db, label='Python')
ax[0].set_ylabel('Amplitude [dB]')
ax[0].grid(True)
ax[0].legend()

angmat = np.unwrap(np.angle(hmat))
angpy = np.unwrap(np.angle(hpy))
ax[1].plot(wmat, angmat, label='Matlab')
ax[1].plot(wpy, angpy, label='Python')
ax[1].set_ylabel('Angle (radians)')
ax[1].grid(True)
ax[1].set_xlabel('Frequency [rad/sample]')
ax[1].legend()

assert (hmat_db[:130] > -6).all()
assert (hpy_db[:130] > -6).all()

assert (hmat_db[278:] <-20).all()
assert (hpy_db[278:] <-20).all()

# disabled for old Octave 3.6
#np.testing.assert_allclose(hpy_db, hmat_db, atol=5) # dB
# %% Savitsky-Golay
import numpy as np
k=3
n=5
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