how do i fix inline function error?

Question

Ann Lee 2022-4-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1686344-how-do-i-fix-inline-function-error

评论： Ann Lee 2022-4-1

采纳的回答： Riccardo Scorretti

在 MATLAB Online 中打开

i m trying to make matrix (4x16)

in forloop, three modifies of 'a' are series (1 to infinite)

it works untill i added 4th a series (which means inline function. i think this line makes error)

i should add inline function and show series's sum to 160 on 4th row in matrix A

and I got this error

>> work5(0.5)

error: sum: wrong type argument 'class'

function A=work5(x)
m=1;
for k=10:10:160
  n=1:k;
  a= sum(nthroot(n.^2,5)./((3.^n).*(n+1)));
  A(1,m)=a;
  
  a= sum((3*n.^2+n)/(2*n.^4+nthroot(n,2)));
  A(2,m)=a;
  
  a= sum((nthroot(37,2)*n.^3)/((2*n.^3)+(3*n.^2)));
  A(3,m)=a;
  
  a= sum(inline('log(n)./(n.^2)','n'));
  A(4,m)=a;
  
  m=m+1;
  
end

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Riccardo Scorretti 2022-4-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1686344-how-do-i-fix-inline-function-error#answer_932174

在 MATLAB Online 中打开

Hi,

you can try this:

work5(0.5)
ans = 4×16
    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361    0.2361
    0.0183    0.0047    0.0021    0.0012    0.0008    0.0005    0.0004    0.0003    0.0002    0.0002    0.0002    0.0001    0.0001    0.0001    0.0001    0.0001
    2.6037    2.8014    2.8760    2.9152    2.9394    2.9558    2.9677    2.9766    2.9837    2.9893    2.9939    2.9978    3.0011    3.0040    3.0064    3.0086
    0.6185    0.7415    0.7927    0.8215    0.8401    0.8532    0.8630    0.8706    0.8767    0.8817    0.8859    0.8895    0.8926    0.8952    0.8976    0.8997
function A=work5(x)
m=1;
fun = @(n) log(n)./(n.^2);                    % ***
for k=10:10:160
  n=1:k;
  a= sum(nthroot(n.^2,5)./((3.^n).*(n+1)));
  A(1,m)=a;
  
  a= sum((3*n.^2+n)/(2*n.^4+nthroot(n,2)));
  A(2,m)=a;
  
  a= sum((nthroot(37,2)*n.^3)/((2*n.^3)+(3*n.^2)));
  A(3,m)=a;
  
  % a= sum(inline('log(n)./(n.^2)','n'));     % ***
  a = sum(fun(n));
  A(4,m)=a;
  
  m=m+1;
end
end