相平面 by Pablo Rodríguez-Sánchez

GeoGebra 命令及参数

1. SlopeField(v(x, y) / u(x, y), N, l, xmin, ymin, xmax, ymax) → slopefield1
2. Textfield(u) → InputBox1
3. Textfield(v) → InputBox2
4. SolveODE(v(x, y) / u(x, y), x(A), y(A), tmin, numStep) → fAback
5. SolveODE(v(x, y) / u(x, y), x(A), y(A), tmax, numStep) → fAforw
6. SolveODE(v(x, y) / u(x, y), x(B), y(B), tmin, numStep) → fBback
7. SolveODE(v(x, y) / u(x, y), x(B), y(B), tmax, numStep) → fBforw
8. Vector((u(x(B), y(B)), v(x(B), y(B)))) → VB
9. UnitVector(VA) → vA
10. UnitVector(VB) → vB
11. Vector(A, A + vA) → v_A
12. Vector(B, B + vB) → v_B
13. ImplicitCurve(u(x, y)) → IsoclineX
14. ImplicitCurve(v(x, y)) → IsoclineY
15. Textfield(numStep) → InputBox3
16. Textfield(tmax) → InputBox4