Matlab牛顿加速迭代法急…………Matlab牛顿加速迭代法急…………记住是牛顿“加速”迭代法解方程是x=e^(-x)在x=0.5附近的根
<p>问题：Matlab牛顿加速迭代法急…………Matlab牛顿加速迭代法急…………记住是牛顿“加速”迭代法解方程是x=e^(-x)在x=0.5附近的根<p>答案：↓↓↓<p class="nav-title mt10" style="border-top:1px solid #ccc;padding-top: 10px;">李天志的回答：<div class="content-b">网友采纳 clc;clear f='x-exp(-x)' df=diff(f) x=0.5; ac=;%加速因子 ac2=0.9; fork=1:10 x=x-ac.*subs(f/df); X(k,:)=x; end formatlongg X plot(X,'o-') 结果： X= 0.5464177022380530.5596799028774960.566311003197218 0.5608708628768790.566387859763440.567143165034862 0.5652565692580520.5670676543873640.567143290409781 0.5665768229182110.5671357258758680.567143290409784 0.5669733095107640.5671425339470730.567143290409784 0.567092292480130.567143214763420.567143290409784 0.5671279907014570.5671432828451460.567143290409784 0.5671387004676360.567143289653320.567143290409784 0.5671419134244710.5671432903341370.567143290409784 0.567142877313950.5671432904022190.567143290409784 可见,加速系数取1,收敛速度最快.
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