.. _pylab_examples-usetex_demo: pylab_examples example code: usetex_demo.py =========================================== .. plot:: /home/tcaswell/source/p/matplotlib/doc/mpl_examples/pylab_examples/usetex_demo.py :: import matplotlib matplotlib.rc('text', usetex=True) import matplotlib.pyplot as plt import numpy as np # interface tracking profiles N = 500 delta = 0.6 X = np.linspace(-1, 1, N) plt.plot(X, (1 - np.tanh(4.*X/delta))/2, # phase field tanh profiles X, (X + 1)/2, # level set distance function X, (1.4 + np.tanh(4.*X/delta))/4, # composition profile X, X < 0, 'k--', # sharp interface ) # legend plt.legend(('phase field', 'level set', 'composition', 'sharp interface'), shadow=True, loc=(0.01, 0.55)) ltext = plt.gca().get_legend().get_texts() plt.setp(ltext[0], fontsize=20) plt.setp(ltext[1], fontsize=20) plt.setp(ltext[2], fontsize=20) plt.setp(ltext[3], fontsize=20) # the arrow height = 0.1 offset = 0.02 plt.plot((-delta / 2., delta / 2), (height, height), 'k', linewidth=2) plt.plot((-delta / 2, -delta / 2 + offset * 2), (height, height - offset), 'k', linewidth=2) plt.plot((-delta / 2, -delta / 2 + offset * 2), (height, height + offset), 'k', linewidth=2) plt.plot((delta / 2, delta / 2 - offset * 2), (height, height - offset), 'k', linewidth=2) plt.plot((delta / 2, delta / 2 - offset * 2), (height, height + offset), 'k', linewidth=2) plt.text(-0.06, height - 0.06, r'$\delta$', {'color': 'k', 'fontsize': 24}) # X-axis label plt.xticks((-1, 0, 1), ('-1', '0', '1'), color='k', size=20) # Left Y-axis labels plt.ylabel(r'\bf{phase field} $\phi$', {'color': 'b', 'fontsize': 20}) plt.yticks((0, 0.5, 1), ('0', '.5', '1'), color='k', size=20) # Right Y-axis labels plt.text(1.05, 0.5, r"\bf{level set} $\phi$", {'color': 'g', 'fontsize': 20}, horizontalalignment='left', verticalalignment='center', rotation=90, clip_on=False) plt.text(1.01, -0.02, "-1", {'color': 'k', 'fontsize': 20}) plt.text(1.01, 0.98, "1", {'color': 'k', 'fontsize': 20}) plt.text(1.01, 0.48, "0", {'color': 'k', 'fontsize': 20}) # level set equations plt.text(0.1, 0.85, r'$|\nabla\phi| = 1,$ \newline $ \frac{\partial \phi}{\partial t}' r'+ U|\nabla \phi| = 0$', {'color': 'g', 'fontsize': 20}) # phase field equations plt.text(0.2, 0.15, r'$\mathcal{F} = \int f\left( \phi, c \right) dV,$ \newline ' r'$ \frac{ \partial \phi } { \partial t } = -M_{ \phi } ' r'\frac{ \delta \mathcal{F} } { \delta \phi }$', {'color': 'b', 'fontsize': 20}) # these went wrong in pdf in a previous version plt.text(-.9, .42, r'gamma: $\gamma$', {'color': 'r', 'fontsize': 20}) plt.text(-.9, .36, r'Omega: $\Omega$', {'color': 'b', 'fontsize': 20}) plt.show() Keywords: python, matplotlib, pylab, example, codex (see :ref:`how-to-search-examples`)