def test_tangent_gradient(self):
cg = CGraph()
x = Function(1.)
y1 = algopy.tan(x)
cg.trace_off()
cg.independentFunctionList = [x]
cg.dependentFunctionList = [y1]
g1 = cg.gradient([1.])[0]
x = UTPM.init_jacobian(1.)
assert_array_almost_equal(g1,UTPM.extract_jacobian(algopy.sin(x)/algopy.cos(x)))
assert_array_almost_equal(g1,UTPM.extract_jacobian(algopy.tan(x)))
def eval_f2(x):
y = algopy.zeros(3, dtype=x)
y[0] = x[1] + x[2] - 5.
y[1] = -1./x[0] + x[2]**3 + 1.
y[2] = -x[1] + algopy.tan(x[0]) -x[2] + 7.
return y
