power.m

来自「国外计算机科学教材系列 numerial method using matla」· M 代码 · 共 23 行

function [lambda,V]= power(A,X,epsilon,max1)

% NUMERICAL METHODS: MATLAB Programs
%(c) 1999 by John H. Mathews and Kurtis D. Fink
%To accompany the textbook:
%NUMERICAL METHODS Using MATLAB,
%by John H. Mathews and Kurtis D. Fink
%ISBN 0-13-270042-5, (c) 1999
%PRENTICE HALL, INC.
%Upper Saddle River, NJ 07458

lambda=0;cnt=0;err=1;iterating=1;state=iterating;

while ((cnt<=max1)&(state==iterating))
   Y=A*X;
   [m j]=max(abs(Y));
   c1=Y(j);
   cnt=cnt+1;
end

V=Y;