Question

用matlab拟合一组已知横纵坐标的数据，得到函数表达式和大致的轨迹

横坐标1 至 10 列 53.805 53.805 52.535 52.112 53.805 56.345 57.615 58.884 60.154 60.154 11 至 20 列 61.001 61.424 62.694 64.81 65.234 66.503 67.35 70.313 71.583 72.852 21 至 30 列 74.969 76.662 78.778 79.202 80.471 81.318 83.011 84.281 84.281 85.127 31 至 40 列 86.82 89.36 91.9 93.169 94.439 94.439 95.709 96.979 99.095 102.06 41 至 50 列 104.17 105.87 107.14 109.68 112.22 119.84 119.41 123.65 127.45 130.84 51 至 60 列 131.69 132.96 134.65 136.77 138.46 139.31 139.73 140.15 141.42 143.54 61 至 70 列 145.66 146.5 146.5 146.92 146.5 146.08 144.81 143.96 142.27 141.42 71 至 80 列 138.88 136.77 134.65 130.84 129.57 127.45 124.91 123.22 122.38 118.57 81 至 90 列 116.03 113.06 109.68 99.519 96.979 96.979 92.746 88.09 85.551 84.281 91 至 100 列 79.202 76.239 75.392 72.429 66.503 61.424 61.424 57.191 57.191 57.19对应的纵坐标1 至 10 列 203.88 203.04 201.77 198.38 195.84 194.57 194.15 193.3 192.88 192.45 11 至 20 列 192.45 192.45 191.18 189.91 189.49 188.22 187.8 186.95 184.83 184.83 21 至 30 列 184.41 183.14 182.3 181.87 180.6 179.33 178.49 178.06 178.06 178.06 31 至 40 列 175.95 174.68 174.25 173.41 173.41 173.41 172.98 170.87 170.44 169.17 41 至 50 列 168.33 167.06 165.79 165.36 164.09 161.55 161.98 160.28 159.02 156.48 51 至 60 列 155.21 151.82 148.01 146.32 142.93 141.24 139.12 137.43 132.35 128.96 61 至 70 列 123.88 116.69 113.3 111.19 107.38 103.14 100.6 96.794 93.408 89.599 71 至 80 列 83.673 81.98 78.594 76.901 75.207 73.938 70.975 70.551 70.128 68.012 81 至 90 列 65.895 64.626 64.202 64.202 63.779 63.779 62.933 62.086 62.086 62.086 91 至 100 列 62.086 62.086 62.086 62.086 62.509 64.202 64.202 65.049 65.049 65.049

Answer 1

拟合的时候把y当作自变量，x当作未知数 这样拟合出来的函数是x = f(y) 知道y求x 就容易了

追问

那怎样才能找到比较接近的图像呢