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plotting/plot_t0.py

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+#! /usr/bin/env python
+
+"""
+Plot the t=0 density expectation value in Lieb-Liniger (n-hole wavepacket).
+
+Setup:
+- ensure matplotlib and numpy are installed in your python environment
+- make this file executable (chmod +x plot_to.py)
+
+Usage: ./plot_t0.py [rho file name]
+"""
+
+
+import math
+import matplotlib.pyplot as plt
+import numpy as np
+import sys
+
+filename = str(sys.argv[1])
+
+x = np.loadtxt(filename.replace('.rhoxt','.x'), unpack=True)
+
+rho = np.loadtxt(filename, usecols=(0), unpack=True)
+
+plt.plot(x, rho, '.', markersize=4)
+
+plt.xlabel('x')
+plt.ylabel(r'$\rho(x, t=0)$')
+plt.title('Density expectation value\n' + filename)
+
+plt.savefig(filename.replace('.rhoxt', '.png'))
+
+plt.show()