Documentation updates.

docs/examples/mesh/plot_image_2D.py

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+import numpy as np
+import matplotlib.pyplot as plt
+from SimPEG import TensorMesh
+
+n = 20
+h = np.ones(n)/n
+M = TensorMesh([h, h])
+I = np.sin(M.gridCC[:,0]*2*np.pi)*np.sin(M.gridCC[:,1]*2*np.pi)
+M.plotImage(I)
+
+plt.show()

docs/examples/mesh/plot_image_3D.py

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+import numpy as np
+import matplotlib.pyplot as plt
+from SimPEG import TensorMesh
+
+n = 20
+h = np.ones(n)/n
+M = TensorMesh([h,h,h])
+
+I = np.sin(M.gridCC[:,0]*2*np.pi)*np.sin(M.gridCC[:,1]*2*np.pi)*np.sin(M.gridCC[:,2]*2*np.pi)
+M.plotImage(I, annotationColor='k')
+
+plt.show()

docs/examples/mesh/plot_nodes.py

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+import numpy as np
+import matplotlib.pyplot as plt
+from SimPEG import TensorMesh
+
+x0 = np.zeros(2)
+h1 = np.linspace(.1,.5,3)
+h2 = np.linspace(.1,.5,5)
+M = TensorMesh([h1,h2],x0)
+M.plotGrid()
+plt.hold()
+plt.plot(M.gridN[:,0], M.gridN[:,1], 'ks', markersize=10)
+plt.show()
+