What's wrong? Would you help me revise it?

MATLAB有错吗？ （1）dx=[dx(1);dx(2);dx(3);dx(4);dx(5);dx(6)]; % Is it wrong?

（2）[t,x]=ode45('ODE45_fun',tspan,x0); %Is it wrong?

（3）What's wrong?

The element type "name" must be terminated by the matching end-tag "</name>". Could not parse the file: d:\matlab7\toolbox\ccslink\ccslink\info.xml

（4）What's wrong? Would you help me revise it?：

Error in ==> funfun\private\odearguments at 110

f0 = feval(ode,t0,y0,args{:}); % ODE15I sets args{1} to yp0. 点击 funfun\private\odearguments at 110 后出现110-118： f0 = feval(ode,t0,y0,args{:}); % ODE15I sets args{1} to yp0. [m,n] = size(f0); if n > 1 error('MATLABdearguments:FoMustReturnCol',... [funstring(ode) ' must return a column vector.']) elseif m ~= neq msg = sprintf('an initial condition vector of length %d.',m); error('MATLABdearguments:SizeIC', ['Solving ' funstring(ode) ' requires ' msg]); end

（5）What's wrong? Would you help me revise it?：

Error in ==> ode45 at 173 [neq, tspan, ntspan, next, t0, tfinal, tdir, y0, f0, odeArgs, ... 点击 funfun\private\odearguments at 173 后出现173-178： [neq, tspan, ntspan, next, t0, tfinal, tdir, y0, f0, odeArgs, ... options, threshold, rtol, normcontrol, normy, hmax, htry, htspan, ... dataType] = ... odearguments(FcnHandlesUsed, solver_name, odeFcn, tspan, y0, ... options, varargin); nfevals = nfevals + 1;

programme:

ODE45_fun：

function dx=ODE45_fun(t,x)

a1=1;a2=1;e1=9;e2=7;f1=56;f2=98;g1=76;g2=665;

a=a1+a2; e=e1+e2; f=f1+f2; g=g1+g2;

dx(1)=x(3)-x(2)+x(4)*x(2)-2*x(5)*x(2)-x(2)*x(2)-x(5)-e-f-g;

dx(2)=x(1)-x(3)+x(4)*x(2)-x(2)*x(2)-x(5)*x(5)-x(5)*x(2)-e*f-g;

dx(3)=x(2)-x(1)+x(5)*x(1)-x(4)*x(3)+x(3)+x(4)+e*g+f;

x(6)=x(4)*x(5)+x(2)*x(3)+e*f+e*g; % it's x(6)，not dx(6)

dx(4)=x(5)*a+x(3)*x(1)+x(3)+e*f*g*x(6)

dx(5)=x(4)*a+x(2)*x(1)-e*f*x(1)-x(2)*x(2)*x(5)-x(2)*x(5)*x(5)-e*f-f*g

dx=[dx(1);dx(2);dx(3);dx(4);dx(5);dx(6)]; % should be revised as dx=[dx(1);dx(2);dx(3);dx(4);dx(5)]; ？ But，x(6)？

ODE45_main：

tspan=[0,10];

x0=[0;0.1;2;0;0.1;2];

[t,x]=ode45('ODE45_fun',tspan,x0);

data=[t,x];

save ODE45_data.txt data -ascii

subplot(2,3,1),plot(t,x(1))

subplot(2,3,2),plot(t,x(2))

subplot(2,3,3),plot(t,x(3))

subplot(2,3,4),plot(t,x(4))

subplot(2,3,5),plot(t,x(5))

subplot(2,3,6),plot(t,x(6))