matlab拟合出错:Function value and YDATA sizes are not equal.x=1:1:5;y=[1976882 2972166 3752790 4077716 4154964]';function y=fitline_1(a,x)y=a(1)+a(2)*x+a(3)*x.^2+a(4)*x.^3;a=lsqcurvefit('fitline_1',[1;1;1;1],x,y);请问哪里出现了问题?
来源:学生作业帮助网 编辑:作业帮 时间:2024/06/02 05:58:28
matlab拟合出错:Function value and YDATA sizes are not equal.
x=1:1:5;
y=[1976882 2972166 3752790 4077716 4154964]';
function y=fitline_1(a,x)
y=a(1)+a(2)*x+a(3)*x.^2+a(4)*x.^3;
a=lsqcurvefit('fitline_1',[1;1;1;1],x,y);
请问哪里出现了问题?
把y赋值语句的转置符号去掉即可.
x是行向量,y应该也是行向量才对.
另外,使用多项式拟合完全可以用polyfit函数,比这个简单很多:
x=1:1:5;y=[1976882 2972166 3752790 4077716 4154964];
a=polyfit(x,y,3);
plot(x,y,'ro',x,polyval(a,x),'.-')
matlab的lsqcurvefit函数做幂函数拟合出错幂函数拟合 错误提示是ydata和函数输出维数不一样(Function value and YDATA sizes are incommensurate),希望各位验证后再给出答案,function F=mihanshu(x,a)F=a(1)*(x.^a(2));
matlab拟合出错:Function value and YDATA sizes are not equal.x=1:1:5;y=[1976882 2972166 3752790 4077716 4154964]';function y=fitline_1(a,x)y=a(1)+a(2)*x+a(3)*x.^2+a(4)*x.^3;a=lsqcurvefit('fitline_1',[1;1;1;1],x,y);请问哪里出现了问题?
Matlab 出错
matlab出错,
This statement is not inside any function.matlab 运行,出错,这是怎么回事
matlab 使用lsqcurvefit函数出错 需要拟合的函数m文件:function f = nihehanshu(a,t)f = (a(1)/a(2))^a(1)*t^(a(1)-1)*exp(-t*a(1)/a(2))/gamma(a(1));程序:t = [1,1.26,1.58,2,2.51,3.16,3.98,5.01,6.31,7.94,10,12.59,15.85,19.95,25.12,31.62];
matlab拟合函数
matlab的函数拟合
matlab中梯度函数gradient运行出错,显示这样的错误信息.Attempt to execute SCRIPT gradient as a function.
matlab 求和的出错
matlab创建function出错,代码:function basePS=functionbasePS(n)%UNTITLED2 Summary of this function goes here% Detailed explanation goes heresyms tbasePS=zeros(1,n+1);for i=0:1:nif 0
MATLAB怎样搞多项式拟合
如何运用MATLAB拟合二次曲线
matlab 怎样实现拉格朗日插值拟合?
怎样用matlab作线性拟合
matlab二元拟合程序是什么
matlab做的曲面拟合
sars的matlab拟合代码