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[½»Á÷] matlab²¢ÐмÆËãÎÊÌâ ÒÑÓÐ2È˲ÎÓë

´ó¼ÒºÃ£¬ÎÒ×î½üÔÚѧϰmatlabÒÅ´«Ëã·¨£¬·¢ÏÖÔËËãʱ¼ä½Ï³¤¡£ÍøÉÏ˵¿ÉÒÔ²¢ÐмÆË㣬ÎҵĵçÄÔÊÇ4ºË¡£ÊÔÁËÒ»¸öÀý×Ó(ÈçÏÂ)£¬·¢ÏÖ²¢ÐмÆËãʱ¼äȷʵËõ¶Ì²»ÉÙ¡£µ«ÊÇÃüÁîÐÐÔËÐÐ matlabpool local 4£¬´ó¸ÅÒâ˼ÊÇÉèÖÃ4ºË¼ÆËã»·¾³£¬³öÏÖ¾¯¸æWarning: matlabpool will be removed  in a future release. Use parpool insted.  ÊäÈëÃüÁîparpool('local',4)ºó¾¯¸æÏûʧ¡£²¢ÐйûÈ»ËãµÄ¿ìÁË¡£

tic
%´«Í³·½Ê½¼ÆËã

c1=1;
for i = 1:500
   c1 = c1+max(eig(rand(i,i)));
end
t1 = toc;

matlabpool open;
%parfor²¢Ðз½Ê½¼ÆËã
tic
c2=1;
parfor ii = 1:500
  c2 = c2+max(eig(rand(ii,ii)));
end
t2 = toc;
matlabpool close;

display(strcat('parfor²¢ÐмÆËãʱ¼ä£º',num2str(t2),'Ãë'));
display(strcat('¿Í»§¶Ë´®ÐмÆËãʱ¼ä£º',num2str(t1),'Ãë'));

parfor²¢ÐмÆËãʱ¼ä£º6.4683Ãë
¿Í»§¶Ë´®ÐмÆËãʱ¼ä£º20.1176Ãë
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Í­³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
3Â¥: Originally posted by ·çÖ®×Ó¶ù at 2017-12-25 23:40:59
³¤ÖªÊ¶ÁË

5Â¥2017-12-26 09:35:39
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Сľ³æ: ½ð±Ò+0.5, ¸ø¸öºì°ü£¬Ð»Ð»»ØÌû
matlab¡£Ò»Æðѧϰ°É£¿£¿

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2Â¥2017-12-25 21:14:38
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

·çÖ®×Ó¶ù

Í­³æ (ÕýʽдÊÖ)

3Â¥2017-12-25 23:40:59
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

¼ªÇÉÀö

Í­³æ (ÕýʽдÊÖ)

ÒýÓûØÌû:
2Â¥: Originally posted by Ììñ· at 2017-12-25 21:14:38
matlab¡£Ò»Æðѧϰ°É£¿£¿

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4Â¥2017-12-26 09:35:31
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