如果切线的斜率为0.5？
，我怎么能计算出曲线的点？Y <- c(0.39, 0.40, 0.42, 0.43, 0.45, 0.46, 0.48, 0.50, 0.52, 0.54, 0.56, 0.58, 0.60, 0.62, 0.64, 0.67, 0.69, 0.71, 0.74, 0.77, 0.80, 0.82, 0.85, 0.89, 0.92, 0.95, 0.99, 1.02, 1.06, 1.10, 1.14, 1.18, 1.22, 1.27, 1.31, 1.36, 1.41, 1.46, 1.51, 1.57, 1.62, 1.68, 1.74, 1.81, 1.87, 1.94, 2.01, 2.08, 2.16, 2.23, 2.31, 2.40, 2.48, 2.57, 2.66, 2.76, 2.86, 2.96, 3.06, 3.17, 3.28, 3.40, 3.52, 3.65, 3.78, 3.91, 4.05, 4.19, 4.34, 4.49, 4.65, 4.81, 4.98, 5.15, 5.33, 5.51, 5.70, 5.90, 6.11, 6.32, 6.53, 6.76, 6.99, 7.23, 7.47, 7.72, 7.99, 8.26, 8.53, 8.82, 9.11, 9.42, 9.73, 10.05, 10.38, 10.72, 11.07, 11.43, 11.80, 12.18, 12.58, 12.98, 13.39, 13.81, 14.25, 14.70, 15.15, 15.62, 16.11, 16.60, 17.11, 17.62, 18.15, 18.70, 19.25, 19.82, 20.40, 20.99, 21.59, 22.21, 22.84, 23.48, 24.14, 24.80, 25.48, 26.17, 26.88, 27.59, 28.32, 29.06, 29.81, 30.57, 31.34, 32.12, 32.91, 33.71, 34.53, 35.35, 36.17, 37.01, 37.86, 38.71, 39.57)
X <- c(2168, 2178, 2188, 2198, 2208, 2218, 2228, 2238, 2248, 2258, 2268, 2278, 2288, 2298, 2308, 2318, 2328, 2338, 2348, 2358, 2368, 2378, 2388, 2398, 2408, 2418, 2428, 2438, 2448, 2458, 2468, 2478, 2488, 2498, 2508, 2518, 2528, 2538, 2548, 2558, 2568, 2578, 2588, 2598, 2608, 2618, 2628, 2638, 2648, 2658, 2668, 2678, 2688, 2698, 2708, 2718, 2728, 2738, 2748, 2758, 2768, 2778, 2788, 2798, 2808, 2818, 2828, 2838, 2848, 2858, 2868, 2878, 2888, 2898, 2908, 2918, 2928, 2938, 2948, 2958, 2968, 2978, 2988, 2998, 3008, 3018, 3028, 3038, 3048, 3058, 3068, 3078, 3088, 3098, 3108, 3118, 3128, 3138, 3148, 3158, 3168, 3178, 3188, 3198, 3208, 3218, 3228, 3238, 3248, 3258, 3268, 3278, 3288, 3298, 3308, 3318, 3328, 3338, 3348, 3358, 3368, 3378, 3388, 3398, 3408, 3418, 3428, 3438, 3448, 3458, 3468, 3478, 3488, 3498, 3508, 3518, 3528, 3538, 3548, 3558, 3568, 3578, 3588)
答案 0 :(得分：0)
尝试使用inflection::ese(X, Y, 0)。
它返回142，对应X = 3578。