作业帮如何把下列散点所描绘的matlab曲线做指数曲线拟合,并求出函数.x = [5.2 5.8 6.8 7.8 8.8 9.7 11.77 13.94 16 18 20 22 23.9 26 27.9 30 32 34 36 38 40 42 44 45.8 47.8 50 51.8 53.8 55.7 57.8 59.6 61.7 63.7 65.7 67.8 69.7 71.6 73.7 75.5
来源：学生作业帮助网 编辑：作业帮 时间：2024/11/15 13:28:46
如何把下列散点所描绘的matlab曲线做指数曲线拟合,并求出函数.x = [5.2 5.8 6.8 7.8 8.8 9.7 11.77 13.94 16 18 20 22 23.9 26 27.9 30 32 34 36 38 40 42 44 45.8 47.8 50 51.8 53.8 55.7 57.8 59.6 61.7 63.7 65.7 67.8 69.7 71.6 73.7 75.5
如何把下列散点所描绘的matlab曲线做指数曲线拟合,并求出函数.
x = [5.2 5.8 6.8 7.8 8.8 9.7 11.77 13.94 16 18 20 22 23.9 26 27.9 30 32 34 36 38 40 42 44 45.8 47.8 50 51.8 53.8 55.7 57.8 59.6 61.7 63.7 65.7 67.8 69.7 71.6 73.7 75.5 77.7 79.7 81.7 83.5 85.6 87.8 89.6 91.5 93.1 95.5 97.5 99.2]
y = [747 646 525 439 381 334 265 210 171 144 121 104 89.1 77.2 68 59 50.2 41.1 33.7 27 22.1 17.9 14.8 12.3 10.1 8.52 6.97 5.81 4.97 4.13 3.53 2.98 2.50 2.12 1.84 1.63 1.46 1.32 1.26 1.19 1.14 1.10 1.07 1.02 0.964 0.912 0.874 0.869 0.878 0.884 0.893]
plot(x,y,'r-')
能否给出更详细的程序,你们所列的程序我还是不能在matlab中生成所要程序.我感觉这个函数应该是指数型的函数,最后我希望求得一个公式.如果为指数形式,请告知我拟合求完之后最终公式的表示形式,
如何把下列散点所描绘的matlab曲线做指数曲线拟合,并求出函数.x = [5.2 5.8 6.8 7.8 8.8 9.7 11.77 13.94 16 18 20 22 23.9 26 27.9 30 32 34 36 38 40 42 44 45.8 47.8 50 51.8 53.8 55.7 57.8 59.6 61.7 63.7 65.7 67.8 69.7 71.6 73.7 75.5
General model Power2:
f(x) = a*x^b+c
Coefficients (with 95% confidence bounds):
a = 5924 (5551,6297)
b = -1.231 (-1.267,-1.196)
c = -30.36 (-34.92,-25.8)
Goodness of fit:
SSE:2201
R-square:0.9985
Adjusted R-square:0.9985
RMSE:6.772