I saw this https://stackoverflow.com/questions/46993819/how-to-create-a-vector-function-in-sympy which uses Matrix() as a workaround to create a vector. The author says, that it can not be transformed between coordinate systems, like real vectors, though.
I need to transform my input and output vector from one coordinate system to another (and back). How are vector functions done in that case? My function is simple: def B_el(r_vec, I): mu_0 = 4 * np.pi * 1e-7 a1 = -0.05 a2 = 0.0 C = mu_0 * I / np.pi r1 = r_vec.i r2 = r_vec.j u = (2 * C * r2 * (a1 * r1 + a2 * r2)) / np.square(r1*r1 + r2*r2) - (C * a2) / (r1*r1 + r2*r2) v = (C * a1) / (r1*r1 + r2*r2) - (2 * C * r1 * (a1 * r1 + a2 * r2)) / np.square(r1*r1 + r2*r2) return Matrix([u, v, 0]) -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to sympy+unsubscr...@googlegroups.com. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/8db840a8-20f9-47ac-a1c3-11b6658f00bfn%40googlegroups.com.
