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yan0415

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[ÇóÖú] jacobiµü´ú·¨Ëã·¨³ö´í£¬Çë¸ßÊÖ°ïæ

jacobiµü´ú·¨Ëã·¨£º
myjacobi.m
function [x,relerr,niter]=myjacobi(A,b,x0,tol,maxiter)
relerr=inf;
niter=1;
S=diag( diag(A) );
T=A-S;
while relerr >=tol &niter < maxiter,
    x=S   ( b-T*x0 );
    relerr=norm( x-x0,inf )/norm( x,inf );
    x0=x;
    niter=niter+1;
end
ÊäÈëÏà¹ØÊý¾Ýºó£¬metlabÌáʾµÚÆßÐÐx=S   ( b-T*x0 );ÓÐÎÊÌ⣺
??? Subscript indices must either be real positive integers or logicals.

Error in ==> myjacobi at 7
    x=S   ( b-T*x0 );
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gotokenya

Òø³æ (³õÈëÎÄ̳)

¡¾´ð°¸¡¿Ó¦Öú»ØÌû

¸Ðл²ÎÓ룬ӦÖúÖ¸Êý +1
ÊÇx=S\( b-T*x0 )°É
2Â¥2012-12-18 20:23:49
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

yan0415

ľ³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by gotokenya at 2012-12-18 20:23:49
ÊÇx=S\( b-T*x0 )°É

ÎÒÊäÈëµÄÊý¾ÝÊÇ£º
h6=hilb(6);
>> x6=ones(6,1);
>> b6=h6*x6;
>> x0=ones(6,1)+1;
>> [y,relerr,inter]=myjacobi(h6,b6,x0,1e-3,1000)
µ«metlabÌáʾ£º
??? Error using ==> mrdivide
Matrix dimensions must agree.

Error in ==> myjacobi at 7
    x=S/( b-T*x0 );
Âé·³ÄúÔÙ¸ø¿´Ò»ÏÂÎÊÌâ³öÔÚÄÄÀ²£¬Ð»Ð»£¡
3Â¥2012-12-19 11:03:22
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

dacoolee

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