Fix examples folder

docs/examples/Mag_back_1.py

@@ -0,0 +1,47 @@
+from simpegPF.MagAnalytics import MagSphereAnalFunA, IDTtoxyz
+from SimPEG import *
+import matplotlib.pyplot as plt
+from mpl_toolkits.axes_grid1 import make_axes_locatable
+
+xr = np.linspace(-300, 300, 41)
+yr = np.linspace(-300, 300, 41)
+X, Y = np.meshgrid(xr, yr)
+Z = np.ones((np.size(xr), np.size(yr)))*150
+
+
+# Bz component at Korea
+inckr = -8. + 3/60
+deckr = 54. + 9/60
+btotkr = 50898.6
+Bokr = IDTtoxyz(inckr, deckr, btotkr)
+
+bx,by,bz = MagSphereAnalFunA(X, Y, Z,100.,0.,0.,0.,0.01,Bokr,'secondary')
+Bzkr = np.reshape(bz, (np.size(xr), np.size(yr)), order='F')
+
+# Bz component at Canada
+incca = 16. + 49/60
+decca = 70. + 19/60
+btotca = 54692.1
+Boca = IDTtoxyz(incca, decca, btotca)
+
+bx,by,bz = MagSphereAnalFunA(X, Y, Z,100.,0.,0.,0.,0.01,Boca,'secondary')
+Bzca = np.reshape(bz, (np.size(xr), np.size(yr)), order='F')
+
+fig = plt.figure( figsize = (14,5) )
+
+ax1 = plt.subplot(121)
+dat1 = plt.imshow(Bzkr, extent=[min(xr), max(xr), min(yr), max(yr)]); 
+divider = make_axes_locatable(ax1)
+cax1 = divider.append_axes("right", size="5%", pad=0.05)
+ax1.set_xlabel('East-West (m)'); ax1.set_ylabel('South-North (m)')
+plt.colorbar(dat1, cax=cax1)
+ax1.set_title('$B_z$ field at Seoul, South Korea')
+
+ax2 = plt.subplot(122)
+dat2 = plt.imshow(Bzca, extent=[min(xr), max(xr), min(yr), max(yr)]); 
+divider = make_axes_locatable(ax2)
+cax2 = divider.append_axes("right", size="5%", pad=0.05)
+ax2.set_xlabel('East-West (m)'); ax2.set_ylabel('South-North (m)')
+plt.colorbar(dat2, cax=cax2)
+ax2.set_title('$B_z$ field at Vancouver, Canada')
+plt.show()