Path: news.mathworks.com!not-for-mail From: "Yi" <hvachy@163.com> Newsgroups: comp.soft-sys.matlab Subject: fix point iteration Date: Sat, 25 Apr 2009 17:37:02 +0000 (UTC) Organization: The MathWorks, Inc. Lines: 18 Message-ID: <gsvhnt$gmt$1@fred.mathworks.com> Reply-To: "Yi" <hvachy@163.com> NNTP-Posting-Host: webapp-02-blr.mathworks.com Content-Type: text/plain; charset="ISO-8859-1" Content-Transfer-Encoding: 8bit X-Trace: fred.mathworks.com 1240681022 17117 172.30.248.37 (25 Apr 2009 17:37:02 GMT) X-Complaints-To: news@mathworks.com NNTP-Posting-Date: Sat, 25 Apr 2009 17:37:02 +0000 (UTC) X-Newsreader: MATLAB Central Newsreader 1127445 Xref: news.mathworks.com comp.soft-sys.matlab:535420 Dear friend: I want to plot a curve, x is my independent value, and y is the dependent value. But I have y = f1(a,b,x) a = g1(a,b,x) b = g2(a,b,x) I want to assume the x value in a reasonable interval and then use fix point iteration to solve a and b first, using function a and b. Then drive these a and b and x(assumption) into y and then plot the curve. I don't know how to solve a and b. Which command should I use? Thanks & Best Regards Yi