Example ******* Some examples can be found in PyEMD/example directory. EMD === Quick start ----------- In most cases default settings are enough. Simply import :py:class:EMD and pass your signal to emd method. .. code:: python from PyEMD import EMD s = np.random.random(100) emd = EMD() IMFs = emd.emd(s) Something more  Here is a complete script on how to create and plot results. .. code:: python from PyEMD import EMD import numpy as np import pylab as plt # Define signal t = np.linspace(0, 1, 200) s = np.cos(11*2*np.pi*t*t) + 6*t*t # Execute EMD on signal IMF = EMD().emd(s,t) N = IMF.shape[0]+1 # Plot results plt.subplot(N,1,1) plt.plot(t, s, 'r') plt.title("Input signal: $S(t)=cos(22\pi t^2) + 6t^2$") plt.xlabel("Time [s]") for n, imf in enumerate(IMF): plt.subplot(N,1,n+2) plt.plot(t, imf, 'g') plt.title("IMF "+str(n+1)) plt.xlabel("Time [s]") plt.tight_layout() plt.savefig('simple_example') plt.show() The Figure below was produced with input: :math:S(t) = cos(22 \pi t^2) + 6t^2 |simpleExample| EEMD ==== Simplest case of using Esnembld EMD (EEMD) is by importing EEMD and passing your signal to eemd method. .. code:: python from PyEMD import EEMD import numpy as np import pylab as plt # Define signal t = np.linspace(0, 1, 200) sin = lambda x,p: np.sin(2*np.pi*x*t+p) S = 3*sin(18,0.2)*(t-0.2)**2 S += 5*sin(11,2.7) S += 3*sin(14,1.6) S += 1*np.sin(4*2*np.pi*(t-0.8)**2) S += t**2.1 -t # Assign EEMD to eemd variable eemd = EEMD() # Say we want detect extrema using parabolic method emd = eemd.EMD emd.extrema_detection="parabol" # Execute EEMD on S eIMFs = eemd.eemd(S, t) nIMFs = eIMFs.shape[0] # Plot results plt.figure(figsize=(12,9)) plt.subplot(nIMFs+1, 1, 1) plt.plot(t, S, 'r') for n in range(nIMFs): plt.subplot(nIMFs+1, 1, n+2) plt.plot(t, eIMFs[n], 'g') plt.ylabel("eIMF %i" %(n+1)) plt.locator_params(axis='y', nbins=5) plt.xlabel("Time [s]") plt.tight_layout() plt.savefig('eemd_example', dpi=120) plt.show() |eemdExample| .. |simpleExample| image:: https://github.com/laszukdawid/PyEMD/raw/master/example/simple_example.png?raw=true :width: 640px :height: 480px .. |eemdExample| image:: https://github.com/laszukdawid/PyEMD/raw/master/example/eemd_example.png?raw=true :width: 720px :height: 540px