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ÒÑÖªÒ»µãM£¨10,10,20£©£¬ÁíÒ»µãP(0£¬0£¬100),ÒÔ¼°Î´Öªµãk£¨x,y,z);MPºÍMKµÄ¼Ð½ÇDΪ5¶È¡£Ò×Öª£¬MPXMK=|MP|x|Mk|xCOS(D)¡£ÓÉ´Ë¿ÉÒÔÇóµÃµãKµÄ¹ì¼£·½³Ì£¬Áîx=0¿ÉµÃµ½µãÔÚyozÃæÉϵĹ켣·½³Ì¡£ÎÒÏëÓÃmatlab»­³öÕâ¸ö¹ì¼££¬±à³ÌÈçÏ£º
clear all
>> syms x y z
x=0;
mp=[x-10,y-10,z-20];
>> mr=[-100,-100,80];
>> t=mp.*mr;
>> f=norm(t);
>> g=norm(mp)*norm(mr)*cosd(5);
>> y=0:0.1:100;
>> g=f;
>> plot(y,z)
Çó½â½á¹ûÏÔʾ£ºconversion to double from sym is not possible
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2Â¥2016-01-04 10:25:12
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ÕÅÔ¾simple

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
2Â¥: Originally posted by Tsin1138 at 2016-01-04 10:25:12
ÔÚ¡° f=norm(t);   g=norm(mp)*norm(mr)*cosd(5);¡±Á½¾äÖУ¬tºÍmpº¬ÓÐδ֪±äÁ¿£¬²»ÄÜÓÃnormº¯Êý£¬¿ÉÒÔ½«¡°f=norm(t); ¡±¸ÄΪ¡°f=sqrt(sum(t.^2));¡±£¬gÒ²ÀàËÆ¡£

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3Â¥2016-01-04 10:43:02
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getengqing

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4Â¥2016-01-04 11:00:22
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ÕÅÔ¾simple

Òø³æ (СÓÐÃûÆø)

ÒýÓûØÌû:
4Â¥: Originally posted by getengqing at 2016-01-04 11:00:22
ÄãµÄ×îºóÒ»¸öplotÊÇ»­Ò»¸öy,zµÄͼ£¬µ«ÄãµÄ³ÌÐòÊÇÓкöà¸öy,z£¬ËùÒÔ³öÏÖÒÔÉÏ´íÎó£¡

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5Â¥2016-01-04 11:12:53
ÒÑÔÄ   »Ø¸´´ËÂ¥   ¹Ø×¢TA ¸øTA·¢ÏûÏ¢ ËÍTAºì»¨ TAµÄ»ØÌû

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ÕÅÔ¾simple: ½ð±Ò+20, ¡ïÓаïÖú 2016-01-05 14:50:16
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6Â¥2016-01-04 11:38:14
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