I keep on getting this error

Question

Charles Dizon 2023-2-15

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1912890-i-keep-on-getting-this-error

回答： Sachin 2023-2-15

File: solution.m Line: 3 Column: 46

Invalid expression. Check for missing multiplication operator, missing or unbalanced delimiters, or other syntax error. To construct matrices, use brackets instead of parentheses.

function [bc_nd,v_newton] = ndd(t,v,tdesired,2)
order=2;
v=v(2:2 + order);
t=t(2:2 + order);
%l=length(v);
%M = ones(l);
v=v';
t=t';
%for getting coeffs
%for i=1:l
 %   M(:,i)=(t'.^(i-1));
%end
%coeff=linsolve(M,v);
v0=v(1,1);
v1=v(2,1);
v2=v(3,1);
t0=t(1,1);
t1=t(2,1);
t2=t(3,1);
b2=(((v2-v1)/(t2-t1))-((v1-v0)/(t1-t0)))/(t2-t0);
b1=((v1-v0)/(t1-t0));
b0=v0;
coeff=[b0 b1 b2]';
% for getting soln
 solution= b0+b1*(tdesired-t0)+b2*(tdesired-t0)*(tdesired-t1) ;
end

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Answer 1

Sachin 2023-2-15

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Hi @Charles Dizon,

As per my understanding, you are getting this error because of you are passing an Integer value inside function declaration. Referring the following information might be of good help to you.

You can’t pass an Integer value as input to a function. That’s why you are getting syntax error.

Remove input "2" from function declaration. Change your function declaration as below -

function [bc_nd,v_newton] = ndd(t,v,tdesired)

For more information about MATLAB function declaration, refer to the following page

https://www.mathworks.com/help/matlab/ref/function.html?searchHighlight=function&s_tid=srchtitle_function_1#btexd6d_seealso

Regards

Sachin