Python directional_derivative 예제들

예제 #1

def test_directional_derivative():
    assert directional_derivative(
        C.x * C.y * C.z,
        3 * C.i + 4 * C.j + C.k) == C.x * C.y + 4 * C.x * C.z + 3 * C.y * C.z
    assert directional_derivative(5 * C.x**2 * C.z, 3 * C.i + 4 * C.j +
                                  C.k) == 5 * C.x**2 + 30 * C.x * C.z
    assert directional_derivative(5 * C.x**2 * C.z, 4 * C.j) == S.Zero

예제 #2

파일: test_field_functions.py 프로젝트: chris-turner137/sympy

def test_directional_derivative():
    assert directional_derivative(C.x*C.y*C.z, 3*C.i + 4*C.j + C.k) == C.x*C.y + 4*C.x*C.z + 3*C.y*C.z
    assert directional_derivative(5*C.x**2*C.z, 3*C.i + 4*C.j + C.k) == 5*C.x**2 + 30*C.x*C.z
    assert directional_derivative(5*C.x**2*C.z, 4*C.j) == S.Zero

    D = CoordSys3D("D", "spherical", variable_names=["r", "theta", "phi"],
                   vector_names=["e_r", "e_theta", "e_phi"])
    r, theta, phi = D.base_scalars()
    e_r, e_theta, e_phi = D.base_vectors()
    assert directional_derivative(r**2*e_r, e_r) == 2*r*e_r
    assert directional_derivative(5*r**2*phi, 3*e_r + 4*e_theta + e_phi) == 5*r**2 + 30*r*phi

예제 #3

파일: test_field_functions.py 프로젝트: moiseszeleny/sympy

def test_directional_derivative():
    assert directional_derivative(C.x*C.y*C.z, 3*C.i + 4*C.j + C.k) == C.x*C.y + 4*C.x*C.z + 3*C.y*C.z
    assert directional_derivative(5*C.x**2*C.z, 3*C.i + 4*C.j + C.k) == 5*C.x**2 + 30*C.x*C.z
    assert directional_derivative(5*C.x**2*C.z, 4*C.j) is S.Zero

    D = CoordSys3D("D", "spherical", variable_names=["r", "theta", "phi"],
                   vector_names=["e_r", "e_theta", "e_phi"])
    r, theta, phi = D.base_scalars()
    e_r, e_theta, e_phi = D.base_vectors()
    assert directional_derivative(r**2*e_r, e_r) == 2*r*e_r
    assert directional_derivative(5*r**2*phi, 3*e_r + 4*e_theta + e_phi) == 5*r**2 + 30*r*phi

예제 #4

 def directional_derivative(field):
     from sympy.vector.functions import directional_derivative
     return directional_derivative(field, self)

예제 #5

파일: test_field_functions.py 프로젝트: arghdos/sympy

def test_directional_derivative():
    assert directional_derivative(C.x*C.y*C.z, 3*C.i + 4*C.j + C.k) == C.x*C.y + 4*C.x*C.z + 3*C.y*C.z
    assert directional_derivative(5*C.x**2*C.z, 3*C.i + 4*C.j + C.k) == 5*C.x**2 + 30*C.x*C.z
    assert directional_derivative(5*C.x**2*C.z, 4*C.j) == S.Zero

예제 #6

파일: vector.py 프로젝트: josephwillard/sympy

 def directional_derivative(field):
     from sympy.vector.functions import directional_derivative
     return directional_derivative(field, self)