Parameters a1=[0,],a2=[0,],a3=[0,],b1=[0,],b2=[0,],b3=[0,],c1=[0,],c2=[0,],c3=[0,],M=[0,],C=[0,],E=[0,],N=[0,];
Variable t,x,y,z;
ODEFunction  x'=a1*x*(y/M-1)-a2*y+a3*z;
y'=-b1*x+b2*y*(1-y/C)+b3*z*(1-z/E);
z'=c1*x*(x/N-1)-c2*y-c3*z;
Data;
t=[0:1:12];
x=[1.0000,1.0777,1.1443,1.3497,1.5881,1.9814,2.1905,2.5799,2.9763,3.2445,3.5765,3.9315];
y=[1.0000,1.0597,1.0982,1.2035,1.3566,1.4610,1.4771,1.4862,1.6052,1.6094,1.8892,2.0334];
z=[1.0000,1.0920,1.2033,1.4031,1.6920,1.9382,2.2159,2.6186,2.9489,3.1536,3.5979,4.0233];

2楼: Originally posted by dingd at 2014-02-20 20:40:16
参考：

Parameters a1=,a2=,a3=,b1=,b2=,b3=,c1=,c2=,c3=,M=,C=,E=,N=;
Variable t,x,y,z;
ODEFunction  x'=a1*x*(y/M-1)-a2*y+a3*z;
y'=-b1*x+b2*y*(1-y/C)+b3*z*(1-z/E);
z'=c1*x*(x/N-1)-c2*y-c3*z;
Dat ...

2楼: Originally posted by dingd at 2014-02-20 20:40:16
参考：

Parameters a1=,a2=,a3=,b1=,b2=,b3=,c1=,c2=,c3=,M=,C=,E=,N=;
Variable t,x,y,z;
ODEFunction  x'=a1*x*(y/M-1)-a2*y+a3*z;
y'=-b1*x+b2*y*(1-y/C)+b3*z*(1-z/E);
z'=c1*x*(x/N-1)-c2*y-c3*z;
Dat ...

5楼: Originally posted by dingd at 2014-02-24 11:52:03
参考下：

均方差(RMSE):0.0743428646356062
残差平方和(SSE):0.182386430233526
相关系数(R): 0.990490604242565
相关系数之平方(R^2): 0.981071637092801
确定系数(DC): 0.97907392333002
F统计(F-Statist ...