Merge branch 'master' of https://github.com/simpeg/simpegem into em/dev

Conflicts:
	.coveragerc
	.gitignore
	.travis.yml
	docs/api_Utils.rst
	docs/conf.py
	docs/index.rst
	requirements.txt
	setup.py

tests/em/test_FDEMCasing.py

@@ -0,0 +1,62 @@
+from SimPEG import Tests, Utils, np
+import SimPEG.EM.Analytics.FDEMcasing as Casing
+import unittest
+from scipy.constants import mu_0
+
+
+n = 50.
+freq = 1.
+a = 5e-2
+b = a + 1e-2
+sigma = np.r_[10., 5.5e6, 1e-1]
+mu = mu_0*np.r_[1.,100.,1.]
+srcloc = np.r_[0., 0., 0.]
+xobs = np.random.rand(n)+10.
+yobs = np.zeros(n)
+zobs = np.random.randn(n)
+plotit = False
+
+def CasingMagDipoleDeriv_r(x):
+    obsloc = np.vstack([x, yobs, zobs]).T
+
+    f = Casing._getCasingHertzMagDipole(srcloc,obsloc,freq,sigma,a,b,mu)
+    g = Utils.sdiag(Casing._getCasingHertzMagDipoleDeriv_r(srcloc,obsloc,freq,sigma,a,b,mu))
+
+    return  f,g
+
+def CasingMagDipoleDeriv_z(z):
+    obsloc = np.vstack([xobs, yobs, z]).T
+
+    f = Casing._getCasingHertzMagDipole(srcloc,obsloc,freq,sigma,a,b,mu)
+    g = Utils.sdiag(Casing._getCasingHertzMagDipoleDeriv_z(srcloc,obsloc,freq,sigma,a,b,mu))
+
+    return  f,g
+
+def CasingMagDipole2Deriv_z_r(x):
+    obsloc = np.vstack([x, yobs, zobs]).T
+
+    f = Casing._getCasingHertzMagDipoleDeriv_z(srcloc,obsloc,freq,sigma,a,b,mu)
+    g = Utils.sdiag(Casing._getCasingHertzMagDipole2Deriv_z_r(srcloc,obsloc,freq,sigma,a,b,mu))
+
+    return f,g
+
+def CasingMagDipole2Deriv_z_z(z):
+    obsloc = np.vstack([xobs, yobs, z]).T
+
+    f = Casing._getCasingHertzMagDipoleDeriv_z(srcloc,obsloc,freq,sigma,a,b,mu)
+    g = Utils.sdiag(Casing._getCasingHertzMagDipole2Deriv_z_z(srcloc,obsloc,freq,sigma,a,b,mu))
+
+    return f,g
+
+
+
+class Casing_DerivTest(unittest.TestCase):
+    def test_derivs(self):
+        Tests.checkDerivative(CasingMagDipoleDeriv_r,np.ones(n)*10+np.random.randn(n),plotIt=False)
+        Tests.checkDerivative(CasingMagDipoleDeriv_z,np.random.randn(n),plotIt=False)
+        Tests.checkDerivative(CasingMagDipole2Deriv_z_r,np.ones(n)*10+np.random.randn(n),plotIt=False)
+        Tests.checkDerivative(CasingMagDipole2Deriv_z_z,np.random.randn(n),plotIt=False)
+
+
+if __name__ == '__main__':
+    unittest.main()