matlab啊!懂的都看看吧..t=0:18;x=[9.6,18.3,29.0,47.2,71.1,119.1,174.6,257.3,350.7,441.0,...513.3,559.7,594.8,629.4,640.8,651.1,655.9,659.6,661.8];f=@(b,t)b(2).*b(3)./(b(3)+(b(2)-b(3)).*exp(-b(1).*t));[b1,r]=nlinfit(t(1:19),x(1:19),f,[0.5,660,9.
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![matlab啊!懂的都看看吧..t=0:18;x=[9.6,18.3,29.0,47.2,71.1,119.1,174.6,257.3,350.7,441.0,...513.3,559.7,594.8,629.4,640.8,651.1,655.9,659.6,661.8];f=@(b,t)b(2).*b(3)./(b(3)+(b(2)-b(3)).*exp(-b(1).*t));[b1,r]=nlinfit(t(1:19),x(1:19),f,[0.5,660,9.](/uploads/image/z/7830488-56-8.jpg?t=matlab%E5%95%8A%21%E6%87%82%E7%9A%84%E9%83%BD%E7%9C%8B%E7%9C%8B%E5%90%A7..t%3D0%3A18%3Bx%3D%5B9.6%2C18.3%2C29.0%2C47.2%2C71.1%2C119.1%2C174.6%2C257.3%2C350.7%2C441.0%2C...513.3%2C559.7%2C594.8%2C629.4%2C640.8%2C651.1%2C655.9%2C659.6%2C661.8%5D%3Bf%3D%40%28b%2Ct%29b%282%29.%2Ab%283%29.%2F%28b%283%29%2B%28b%282%29-b%283%29%29.%2Aexp%28-b%281%29.%2At%29%29%3B%5Bb1%2Cr%5D%3Dnlinfit%28t%281%3A19%29%2Cx%281%3A19%29%2Cf%2C%5B0.5%2C660%2C9.)
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