I wonder what the inside [] represents when using ode.

When using ode, I used the following format.

[t C] = ode45(@Columnfun_ED_BFDM2_KH_0302,tspan,IC,opts,dz,column_Number,Nz,e,Q_z,Q_D,Q_E,Q_R,Q_F,C_F,A,F,H,tact,N,L);

[t C q] = ode45(@Columnfun_ED_BFDM2_KH_0302,tspan,IC,opts,dz,column_Number,Nz,e,Q_z,Q_D,Q_E,Q_R,Q_F,C_F,A,F,H,tact,N,L);

I accidentally put several variables inside [], but the value is strange, so I ask. Is the order in [] set?

For example, if you enter [ t C ], the function seems to call out the variables t and C.

If you enter [t C q], t and C seem to be called by ode. I wonder what q stands for at this time!!

[Stephen23]

"When using ode, I used the following format."

Do not use that deprecated syntax. The best way to pass extra parameters is to use an anonymous function, exactly as the ODE45 documentation recommends:

https://www.mathworks.com/help/matlab/ref/ode45.html#bu3uhuk

"Is the order in [] set?"

Yes, and what its output arguments are is explained in the ODE45 documentation.

"If you enter [t C q], t and C seem to be called by ode. I wonder what q stands for at this time!!"

Rather than wondering, guessing, and then asking random strangers on the internet it is much simpler to read the ODE45 documentation, which explains what every output argument is:

The ODE45 documentation has a section entitled "Output Arguments", which explains the outputs.

[채원 이]

Thanks for the reply.

Answer 1

[Cris LaPierre]

See this syntax in the documentation for ode45

[t,y,te,ye,ie] = ode45(odefun,tspan,y0,options)

[채원 이]

Thanks for the reply. As I said above, I looked it up and figured it out.