fieldlines3D

Fieldlines3D plots a field line with the initial point P(x0,y0,z0).

fieldlines3D(X,Y,Z,U,V,W,x0,y0,z0) plots a field line with the initial point P(x0,y0,z0).The matrices X,Y,Z,U,V,and W must all be the same size and contain corresponding position and field components.The function employs the 4th order Runge-Kutta method for solving numerically differential equation y'=f(x,y).