# -*- coding: utf-8 -*-
"""
Created on Mon Aug 11 18:50:51 2014

@author: Anish
"""

# Importing libraries 
import os
os.system('cls')
import numpy as np
import matplotlib.pyplot as plt

N = 145
nvec = np.linspace(-N+1, N-1, num=N)
y1 = cos(2.0*pi*nvec/N) 
#clf()
plt.plot(nvec,y1,label="Original")

y1_reverse = cos(-2.0*pi*nvec/N) 
plt.plot(nvec,y1_reverse,label="Reversed")
plt.xlabel('time')
plt.ylabel('Signal')
legend(bbox_to_anchor=(.5, .9), loc=1, borderaxespad=0.)
#plt.legend("Original","Time Reversed")

TRSignals_illustration

A simple code for visualizing time reversal in signals

Time Reversal of signals: a simple illustration

Python