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libralibra

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dubo(½ð±Ò+1): »¶Ó­³£À´³ÌÐòÓïÑÔ°æÌÖÂÛ 2011-06-19 15:27:10
bluesea57(½ð±Ò+2): ÎÊÌâÒѽâ¾ö 2011-06-19 17:00:38
sumÊǶԾØÕóÇóºÍ,numelÊÇÇó¾ØÕóËùÓÐÔªËØ¸öÊý

ÀýÈç
CODE:
a = [ 1 0 1
         1 1 0
        0 1 1];
sum(a(:)) = 6
numel(a) = 9

´ËʱÇóµÃ±ÈÂʾÍÊÇsum(a()/numel(a) = 6/9 = 2/3

ÄãµÄÐèÇó,ÒªÏȶÔh·§Öµ¶þÖµ»¯Ò»´Î,È»ºó¶Ô¶þÖµ»¯½á¹ûͼƬʹÓÃÉÏÃæµÄ·½·¨¼´¿É
¼ÙÉèH·ÖÁ¿·§ÖµÎªht
CODE:
mask_h = H>ht;
ratio_h = sum(mask_h(:))/numel(mask_h);

matlab/VB/python/c++/Javaд³ÌÐòÇë·¢QQÓʼþ:790404545@qq.com
2Â¥2011-06-19 13:34:13
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bluesea57

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
Originally posted by libralibra at 2011-06-19 13:34:13:
sumÊǶԾØÕóÇóºÍ,numelÊÇÇó¾ØÕóËùÓÐÔªËØ¸öÊý

ÀýÈç
CODE:
a = [ 1 0 1
         1 1 0
        0 1 1];
sum(a(:)) = 6
numel(a) = 9

´ËʱÇóµÃ±ÈÂʾÍÊÇsum(a()/numel(a) = 6/9 = 2/3

ÄãµÄÐè ...

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3Â¥2011-06-19 17:10:31
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libralibra

ÖÁ×ðľ³æ (ÖøÃûдÊÖ)

æôÆï½«¾ü

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jjdg(½ð±Ò+1): ¸Ðл²ÎÓë 2011-06-20 11:58:49
ÒýÓûØÌû:
Originally posted by bluesea57 at 2011-06-19 17:10:31:
ÊDz»ÊÇÄúÉϱߵļÆËã±ÈÂʵijÌÐòÖ»ÓÐÔÚ¶ÔͼƬ2Öµ»°ºó²Å¿ÉÒÔʹÓÃÄúµÄÄǸö¼ÆË㹫ʽ£¿ÎÒÀ§»óµÄÊÇ£¬SUMÊÇÇóºÍ£¬NUMELÊǼÆËãÔªËØ¸öÊý£¬¶øÄúµÄÄǸöÇó±ÈÂʹ«Ê½Ç¡ºÃÊÇʹÓÃÔªËØÖ®ºÍ±ÈÉÏÔªËØ¸öÊý£¬²»¹ýÈç¹ûͼƬ²»½øÐжþÖµ»¯ ...

sum¶Ô¾ØÕóÔªËØÇóºÍ,numelÊǸöÊý
Èç¹û
a = [1 2 3;
       3 2 1]
ÄÇôsum(a()==12, numel(a)=6

ÄãÒªÇóÃæ»ý±È,¶þÖµ»¯ºósum/numelÊÇ×î¼òµ¥µÄ°ì·¨.¶þÖµ»¯ÊDZØÐëµÄ
matlab/VB/python/c++/Javaд³ÌÐòÇë·¢QQÓʼþ:790404545@qq.com
4Â¥2011-06-19 18:03:48
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

bluesea57

Ìú³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
Originally posted by libralibra at 2011-06-19 18:03:48:
sum¶Ô¾ØÕóÔªËØÇóºÍ,numelÊǸöÊý
Èç¹û
a = [1 2 3;
       3 2 1]
ÄÇôsum(a()==12, numel(a)=6

ÄãÒªÇóÃæ»ý±È,¶þÖµ»¯ºósum/numelÊÇ×î¼òµ¥µÄ°ì·¨.¶þÖµ»¯ÊDZØÐëµÄ

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