Added common line argument parser, to avoid having to edit the file change user parameters.

libraries/dsp/st/python/try_histogram.py

@@ -23,25 +23,33 @@
 """Try histogram
 
 Usage:
-> python try_histogram.py
+> python try_histogram.py -h
 
 """
 
+import argparse
 import numpy as np
 import matplotlib.pylab as plt
 
 figNr = 1
 
-# Parameters
-Nbins = 100
-dc = 0
-mu = 100
-sigma = 15
+# Parse arguments to derive user parameters
+_parser = argparse.ArgumentParser('try_histogram')
+_parser.add_argument('--Nbins', default=100, type=int, help='Number of bins in historgram')
+_parser.add_argument('--dc', default=0.0, type=float, help='DC offset of the data')
+_parser.add_argument('--ampl', default=1.0, type=float, help='Amplitude of the sinus data')
+_parser.add_argument('--sigma', default=15.0, type=float, help='Standard deviation of the random data')
+args = _parser.parse_args()
+
+Nbins = args.Nbins
+dc = args.dc
+ampl = args.ampl
+sigma = args.sigma
 
 # Sinus
 N = Nbins * 100
 t = 2 * np.pi * np.arange(0, N) / N
-a = dc + np.sin(t)
+a = dc + ampl*np.sin(t)
 
 # Plot histogram
 plt.figure(figNr)
@@ -53,7 +61,7 @@ plt.grid(True)
 figNr += 1
 
 # Gaussian noise
-x = mu + sigma * np.random.randn(N)
+x = dc + sigma * np.random.randn(N)
 
 # Plot histogram
 plt.figure(figNr)