Error when calling function, "Invalid expression. When calling a function or indexing a variable, use parentheses. Otherwise, check for mismatched delimiters."

function m_roots(f,m)

xroots = zeros(1,m);
dx=1/100; x=0; jj=0;

while jj<m
    while f(x)*f(x+dx)>0, x=x+dx; end
    
    jj=jj+1;
    xroots(jj) = fzero(f,x);
    x = x+2*dx;
    
end

posxroots = xroots(xroots>0);
x = linspace(0,m,201);
plot(x,f(x), posxroots, f(xroots),'o');

end

It says the error is on line 16 column 16, which is right aftewr the 'm' in x = linspace(0,m,201)

No clue why its giving me this error. Is there something else wrong with my code?

[the cyclist]

Can you give an example of calling that function, that exhibits that error? The things I try either give a different error, or they result in the function just running forever (or at least beyond my patience).

[Walter Roberson]

Also, could you attach the .m as an attachment? There might be an odd character in it that did not show up when you pasted.

Answer 1

[JAIMIN PATEL]

L1=0.25; L2=0.1; L3=0.15; L4=0.15; k1=1.65; k2=2.81; k3=9.2; k4=10.7; t1=1100; t5=337.5; q=[t1-t5]/[(L1/k1)+(L2/k2)+(L3/k4)+(L4/k4)]; ti=1; for j=2:1:4 for i=j-1 tj=ti-q*(Li/ki) end end disp(tj)

I want to solve this but I don't know how to put values of Li and Ki as L1,L2,L3,L4 and k1,k2,k3,k4?? Help me if any one know

[the cyclist]

I assume you intended to ask a new question, rather than write this as an answer on a completely unrelated question.

Go to this link and click on the blue GO button near where it says "Ask a question".

Answer 2

[JAIMIN PATEL]

ti=1; for j=2:1:4 for i=j-1 tj=ti-q*(Li/ki) end end

How can I call vale of Li and Ki ??

Answer 3

[JAIMIN PATEL]

assume i:1:4 how to take ti=t1,t2,t3,t4 ?? Ans. Fast

[Walter Roberson]

http://www.mathworks.com/matlabcentral/answers/6200-tutorial-how-to-ask-a-question-on-answers-and-get-a-fast-answer

You should be starting your own Question for these matters.