How can i solve this equation with for loop?

Question

Volkan Yangin 2017-3-9

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/328960-how-can-i-solve-this-equation-with-for-loop

评论： Volkan Yangin 2017-3-9

   y=[1 4 5 6 8]
for g=1:1:numel(y)
  W1(g)=15*y(g)
  W2(g)=@(x) x.^2+y(g)
  f(g) = @(x) W1(g)+W2(x)+y(g);
  ar = [-100  100];
  for k1 = 1:length(ar);
      rts(k1) = fzero(f(g), ar(k1))
  end
    end

Error: FUN must be a function, a valid string expression, or an inline function object.

To calculate the roots of this equation, for loop must be used, but i made a mistake when writing the code. How can i achieve this problem?

To find 5 roots of x, how kind of a change must be done for this operation?

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Answer 1

Torsten 2017-3-9

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https://ww2.mathworks.cn/matlabcentral/answers/328960-how-can-i-solve-this-equation-with-for-loop#answer_257996

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y = [1 4 5 6 8];
for g=1:1:numel(y)
  W1 = 15*y(g);
  W2 = @(x)x.^2+y(g);
  f  = @(x) W1+W2(x)+y(g);
  ar=[-100 100];
  for k1 = 1:length(ar)
    rts(k1,g)=fzero(f,ar(k1));
  end
end