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2Â¥2008-08-06 20:17:46
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quiver(X,Y,U,V,s,¡¯linespec¡¯,¡¯filled¡¯) U£¬VΪ±ØÑ¡Ï¾ö¶¨Ê¸Á¿³¡Í¼Öи÷ʸÁ¿µÄ´óСºÍ·½Ïò£¬sΪָ¶¨Ëù»¼ýÍ·µÄ´óС£¬È±Ê¡Ê±È¡1,linespecΪ×Ö·û´®£¬Ö¸¶¨ºÏ·¨µÄÏßÐκͲÊÉ«£¬filledÓÃÓÚÌî³ä¶¨ÒåµÄ»æÍ¼±êʶ·û [x,y]=meshgrid(-2:.2:2,-1:.15:1); z=x.*exp(-y.^2); [px,py]=gradient(z,.2,.15); contour(x,y,z); hold on,quiver(x,y,px,py),axis image ¶à±ßÐεÄÌîÉ«fill(x,y,c) c¶¨ÒåÑÕÉ«×Ö·û´®£¬¿ÉÒÔÊÇ¡¯r¡¯,¡¯b¡¯µÈ£¬Ò²¿ÉÒÔÓÃRGBÈýÉ«±íʾ[r,g,b]ֵΪ0-1 ͼÐεÄËÄά±íÏÖ |
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²»¶Ôѽ,Õâ¸öÎҸıä¹ý,ÊÇscale,ËûÖ»ÄܸıäÕû¸ö¼ýÍ·µÄ³¤¶È²»Äܸıä´óС quiver(...,scale) automatically scales the arrows to fit within the grid and then stretches them by the factor scale. scale = 2 doubles their relative length, and scale = 0.5 halves the length. Õû¸ö¼ýÍ·(°üÀ¨Ö±Ïß²¿Ëû)¸Ä±ä´óСÎÒ¿ÉÒÔͨ¹ý¸Ä±äÏß¿íÀ´ÊµÏÖ,¿ÉÊÇǰ¶Ë¼ýÍ·(²»°üÀ¨Ö±Ïß²¿·Ö)µÄ´óС²»ÖªµÀÓ¦¸ÃÔõô¸Ä±ä |
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