matlab 拟合建模

14：26

几天无解，欲哭无泪    求指导
x=0.0 1.0 2.0 4.0 6.0 8.0 10.0 12.0 12.1 12.2 12.3 12.4 12.5 12.6 12.7 12.8 12.9 13.0 13.1 13.2 13.3 13.4 13.5 13.6 13.7 13.8 13.9 14.0 15.0 16.0 17.0 18.0 19.0 20.0 21.0 22.0 23.0 24.0 25.0 26.0 27.0 28.0 29.0 30.0 31.0 32.0 33.0 34.0 35.0 36.0 38.0 40.0 42.0 44.0 52.0 56.0 60.0 65.0 70.0 75.0 80.0 85.0 90.0 95.0 100.0 105.0 110.0 112.0 112.1 112.2 112.3 112.4 112.5 112.6 112.7 112.8 112.9 113.0 113.1 113.2 113.3 113.4 113.5 113.6 113.7 113.8 113.9 114.0 115.0 116.0 117.0 118.0 119.0 120.0 121.0 122.0 123.0 124.0 125.0 127.0
y=-108.6 -97.2 -99.7 -108.7 -113.2 -107.9 -116.9 -109.9 -448.0 -694.9 -718.0 263.4 600.0 823.2 1018.5 1210.2 1398.9 1558.6 1694.5 1840.1 1961.5 2090.0 2220.8 2336.9 2483.2 2571.5 2676.6 2735.6 3381.9 3844.6 4199.5 4628.0 4944.2 5165.4 5299.5 5416.3 5497.4 5567.6 5739.7 5806.3 5890.6 5991.7 5953.8 6095.0 6148.6 6106.0 6200.7 6258.2 6236.6 6213.9 6230.6 6345.8 6393.1 6490.7 6507.1 6494.1 6508.2 6860.7 6742.4 6653.3 6690.1 6821.4 6755.9 6697.3 6540.9 6469.8 6494.1 6547.2 6336.6 6163.7 4614.1 2458.4 1177.2 550.9 72.1 -31.6 -131.9 -221.1 -233.3 -239.6 -232.4 -222.3 -213.1 -204.4 -196.4 -190.9 -187.9 -185.7 -177.3 -184.3 -191.3 -188.0 -177.6 -178.8 -183.6 -179.1 -174.0 -187.4 -195.3 -175.6
: p+ g$ V8 W2 N( m% h! H通过计算机软件（matlab）来拟合出该数据，提出拟合的思路和方法，并给出合理性及可行性验证。

Mr.hridy

估计只能用分段函数拟合了，我觉得一般的函数没法表达，或者去掉若干点，再次尝试下。。