Question

matlab中使用inline 和 nlinfit 报错!!!!!!!

代码：
myfunc=inline('a(1)/abs(x)+a(2)/sqrt(abs(x))+a(3)+a(4)*sqrt(abs(x))+a(5)*abs(x)','a','x');
a=nlinfit(x,y,myfunc,[0.5 0.1 0.2 0.3 0.4]);

错误：
??? Error using ==> nlinfit at 113
Error evaluating inline model function.

Error in ==> allan at 32
a=nlinfit(x,y,myfunc,[0.5 0.1 0.2 0.3 0.4]);

Caused by:
Error using ==> inlineeval at 15
Error in inline expression ==>
a(1)/abs(x)+a(2)/sqrt(abs(x))+a(3)+a(4)*sqrt(abs(x))+a(5)*abs(x)
Matrix dimensions must agree.

Answer 1

inline函数中的除应该用./

a(1)./abs(x)+a(2)./sqrt(abs(x))+a(3)+a(4)*sqrt(abs(x))+a(5)*abs(x)