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Çó½Ì£º·Ç²ÎºÍ°ë²ÎÄ£ÐÍÈçºÎÓÃRµÃµ½MSE (mean squared error)?
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Çë½Ì¸÷λ´óÉñ£¬ Õë¶Ô·Ç²ÎºÍ°ë²ÎÄ£ÐÍ£¬ÈçºÎͨ¹ýRµÃµ½mean squared error? Ï£ÍûÄÜд³öcode £¨²»ÓÃÏֳɵÄpackage£©¡£ ¾Ù¸öÀý×Ó£¬¼ÙÉèÎÒµÄÄ£ÐÍÊÇ: y=sin(u)*x1+4*x2+e, ÆäÖÐu ÊÇuniform distribution, x1,x2 ÊDZäÁ¿£¨¼ÙÉèΪÕý̬·Ö²¼). ÏÖÔÚÐèÒªÇóÁ½ÖÖÇé¿öϵÄMSE£º1£¨Õâ¸öÎÊÌâ±È½ÏÖØÒª£©£¬¼ÙÉèÎÒÃÇÖªµÀÕâ¸ö¾ßÌåµÄÄ£Ð͵ÄÐÎʽ£¬Èç¹ûÇó³öMSE £¿£¨ÓÉÓÚSin(u)ÊǸöº¯Êý£¬Õâ¸öµØ·½ÊÇÓ¦¸Ãµ¥¶ÀÓà IMSE ÇóÂð£¿ÒòΪMSEÖ»ÄÜÇó³£ÊýϵÊý¶Ô°É£¿£© 2£¬ ¼ÙÉèÎÒÃDz»ÖªµÀÕâ¸ö°ë²ÎµÄ¾ßÌåÐÎʽ£¬¼´Í¨¹ýy=a(u)*x+e £¨ÕâÀïµÄXÆäʵ·Ö±ðÊÇx1 x2, ËùÒÔa£¨u£©Ò²ÓÐÁ½¸ö£¬·Ö±ðÊÇx1 ºÍx2µÄ¡°ÏµÊý¡±£©Ò²¾ÍÊÇ˵²»ÖªµÀÄĸöϵÊýÊdz£Êý£¬ÄĸöÊÇfunction£¬ µÄ·Ç¾ßÌåÐÎʽÇó³öMSE. ÏȶàлÀ²! |
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