MATLAB: Can someone write an example of using the secant method to find roots of equations

looprootsroots of equationssecantsecant methodsymbolic

I can't use symbolic calculus. The loop needs to be limited since divergence is possible.

Best Answer

You can find an example here:

http://en.wikipedia.org/wiki/Secant_method

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If n is the number whose 5th root has to be calculated:
function f = fifth_root(n)
  xold=10;
  for i = 1:100
  xnew = xold - (xold*xold*xold*xold*xold-n)/(5*xold*xold*xold*xold);
  xold=xnew;
  end
  f=xnew
  end

Related Question

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