求解一道matlab curve fitting的题目,
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求解一道matlab curve fitting的题目,
求解一道matlab curve fitting的题目变了X与Y之间的关系是Y=a*X-a*x^2采集到的数据是 X = [0.028 0.049 0.209 0.324 0.421 0.536 0.613 0.716 0.813 0.897 0.922]; Y = [0.055 0.069 0.569 1.234 1.324 1.567 1.421 1.650 1.581 0.770 0.610];用MATLAB求a值,并且画出X和Y 的图像
求解一道matlab curve fitting的题目变了X与Y之间的关系是Y=a*X-a*x^2采集到的数据是 X = [0.028 0.049 0.209 0.324 0.421 0.536 0.613 0.716 0.813 0.897 0.922]; Y = [0.055 0.069 0.569 1.234 1.324 1.567 1.421 1.650 1.581 0.770 0.610];用MATLAB求a值,并且画出X和Y 的图像
cftool拟合工具箱命令行窗口里输入X = [0.028 0.049 0.209 0.324 0.421 0.536 0.613 0.716 0.813 0.897 0.922]; Y = [0.055 0.069 0.569 1.234 1.324 1.567 1.421 1.650 1.581 0.770 0.610];
左上角的参数里进行设置:X data选择变量X,Y data选择变量Y;
拟合类型选择Custom Equation,然后Y=f(X)=a*X-a*X^2
结果为General model: f(X) = a*X-a*(X^2)Coefficients (with 95% confidence bounds): a = 6.317 (5.133, 7.501) %这个就是你要求的值
Goodness of fit: SSE: 0.9431 R-square: 0.7356 Adjusted R-square: 0.7356 RMSE: 0.3071
左上角的参数里进行设置:X data选择变量X,Y data选择变量Y;
拟合类型选择Custom Equation,然后Y=f(X)=a*X-a*X^2
结果为General model: f(X) = a*X-a*(X^2)Coefficients (with 95% confidence bounds): a = 6.317 (5.133, 7.501) %这个就是你要求的值
Goodness of fit: SSE: 0.9431 R-square: 0.7356 Adjusted R-square: 0.7356 RMSE: 0.3071