matlab的lsqcurvefit多元函数拟合问题答:改成如下:x1=[2007,2008,2009,2010,2011]';x2=[3.96,3.67,3.31,3.06,3.06]';x=[x1,x2];y=[295.98,300.18,304.44,308.77,313.15]';fun=inline('1./(a(1)+(a(2).*exp(-x(:,2).*(x(:,1)-2006)))','a','x');a=lsqcurvefit(fun,[3.5 3.5],x,y)结果...
MATLAB哪个版本有mnrfit函数答:我看了下我的matlab 2009的 里面有这个函数 mnrfit Multinomial logistic regression Syntax B = mnrfit(X,Y)B = mnrfit(X,Y,param1,val1,param2,val2,...)[B,dev] = mnrfit(...)[B,dev,stats] = mnrfit(...)Description B = mnrfit(X,Y) returns a matrix B of coefficient ...
MATLAB指数函数如何表达?答:2522,2523,2523,2522,2522,2522,2521,2521,2521,2521,2521,2521,2521,2521];k=exp(p(2)+p(1)*xxx)plot(w,z,'x',xxx,yyy);legend('已确诊病例累计');xlabel('天数');ylabel('人数');title('利用前20天数据作出的logistic拟合')拟合的不是很理想,不过还可以,思想就是这样!!!