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ÎÒÏë°Ñ»ý·Ö£¨²»¶¨»ý·Ö£©µÄ½á¹ûI=I£¨x1£©(±ÈÈçÏÂÃæµÄÀý×ÓÖлý·Ö³öÀ´º¯ÊýÓ¦¸ÃÊÇ0.5*k*x1^2)´øÈëµ½y1ÖУ¬È»ºó°Ñy1=y1(x1)Õâ¸öº¯Êýplot³öÀ´£¬¿ÉÊdzöÏÖÁËÈçϵĴíÎó£º Error using plot A numeric or double convertible argument is expected Èç¹ûÎÒÖ±½Ó°Ñ»ý·Ö³öÀ´µÄ½á¹û£¬¼´0.5*k*x1^2дÈëy1ÖжÔÓ¦µÄλÖã¬Ôò²»»á±¨´í£¬³É¹¦plot£¬ÇëÎÊÒªÈçºÎ½â¾öÕâ¸öÎÊÌ⣿Çë¸÷λ̳ÓÑÖ¸½Ì ´úÂëÈçÏ£º syms x1; x1 = 0:0.00001:0.0035; k = 1000/0.0035; I = int(k.*x1); y1 = 1400.*log((I+10)/10); plot(x1,y1,'k') |
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