Need help storing each iteration from "for loop" to a vector.

I have a "newton.m" (newton's method) file that I want to iterate 1000 times starting from -3 to 4. I am having issues with storing each iteration output to a vector. Can someone please help? I have attached the "newton.m" file.

I WANT TO STORE EACH ITERATION SO THAT I CAN PLOT XVEC VS X.

This is what I got so far:

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ish = @(z) newton( 'x^3-2*x^2-11*x+12', '3*x^2-4*x-11',z, .0000001, 30 );

x= linspace(-3,4,1000);

xvec=zeros(1,length(x));

for ii= 1:length(x)

root= ish(x(ii));

xvec(ii)=root

end

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[Matt J]

I am having issues with storing each iteration output to a vector.

What is the issue?

[Phi Tran]

I want to store the roots to a vector and plot it.

[Matt J]

It's not clear why the code you originally posted wouldn't work. Are you assuming it generates error messages when we run it?

[Torsten]

I suspect that "ish(z)" can be a vector.

Answer 1

[KSSV]

root = cell(1,length(x)) ;
  for ii= 1:length(x)
  root{ii}= ish(x(ii));
  end

[Phi Tran]

I am getting this message after inputting what you have posted:

In an assignment A(:) = B, the number of elements in A and B must be the same.

Error in Untitled13 (line 10) xvec(ii)=root

[KSSV]

Make root a cell...modified the answer..

[Phi Tran]

Cool, so I got the list of numbers now. Now how do I plot a cell?

[Phi Tran]

nvm, figured it out! Thanks!!