# A sine chirp with increasing frequency and amplitude
x = np.linspace(0, 1, 400)  # time
y = 10 ** (2 * x)  # frequency, growing exponentially from 1 to 100 Hz
phase = 2 * np.pi * (10 ** (2 * x) - 1) / (2 * np.log(10))
z = np.sin(phase) * x ** 2 * 10  # amplitude, growing quadratically

fig = plt.figure()
ax = fig.add_subplot(projection='3d')
ax.plot(x, y, z)

ax.set_xlabel('Time (linear)')
ax.set_ylabel('Frequency, Hz (log)')
ax.set_zlabel('Amplitude (symlog)')

ax.set_yscale('log')
ax.set_zscale('symlog')