线性回归示例3：最小二乘拟合与几何构造

GeoGebra 命令及参数

1. Line(F, H) → a
2. OrthogonalLine(A, xAxis) → b
3. OrthogonalLine(E, xAxis) → c
4. OrthogonalLine(B, xAxis) → d
5. OrthogonalLine(D, xAxis) → e
6. OrthogonalLine(C, xAxis) → f
7. Intersect(b, a) → H_1
8. Intersect(c, a) → I
9. Intersect(d, a) → J
10. Intersect(a, f) → K
11. Intersect(e, a) → L
12. Polygon(A, H_1, 4) → poly1, g, h, i, j, M, N
13. Polygon(I, E, 4) → poly2, k, l, m, n, O, P
14. Polygon(B, J, 4) → poly3, p, q, r, s, Q, R
15. Polygon(L, D, 4) → poly4, t, a_1, b_1, c_1, S, T
16. Polygon(K, C, 4) → poly5, d_1, e_1, f_1, g_1, U, V
17. Sum(A1:A5) → A6
18. FitLineY({A, B, C, D, E}) → h_1