How can i solve an equation in matlab using Newton-Raphson method?

2 views (last 30 days)
I want to solve monotonically increasing function g(lambda)and has a unique zero,by Newton-Raphson method in matlab.The equation is : g(lambda)= -zm'*inv(M)*inv(inv(M)+lambda.*Q)*Q*inv(inv(M)+lambda.*Q)*inv(M)*zm; the variable is lambda

Accepted Answer

Walter Roberson
Walter Roberson on 28 Nov 2011
A specific Newton-Raphson routine is not provided in MATLAB (at least not that I have seen.) You can find MATLAB coding for it in a number of places.
I have to ask, though, whether any efficiency gains you might hypothetically gain using this instead of using fzero() will be worth the time you spend programming and debugging this? (I am not convinced that NR would be any faster than fzero()'s adaptive method, but that is a different point.) Has using NR been imposed on you? Or did fzero() fail?
  8 Comments
Walter Roberson
Walter Roberson on 28 Nov 2011
As cited above, http://www.mathworks.com/matlabcentral/answers/22336-code-assistance

Sign in to comment.

More Answers (0)

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!