Doubt regarding ode45 plotting

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Pavan Kumar
Pavan Kumar 2015-1-27
编辑： Pavan Kumar 2015-2-3
Dear Friends,
I need to plot ABS(B(1)) Vs delk in the following program code. How can i include delk variable in the ode45 function calling line.

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采纳的回答

Torsten
Torsten 2015-1-28
Please make more clear what you try to plot.
As far as I can see, delk is a model parameter (scalar).
B is a vector (solution at different times).
You can't plot a vector over a scalar.
I guess you want to plot different solutions B over time for different values of delk.
For this puropse, you have to generate different solutions B (e.g. in a loop in which you call ODE45 several times for changing values of delk).
Best wishes
Torsten.
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Pavan Kumar
Pavan Kumar 2015-1-29
Thanks a lot..Will try it and come back to you
Pavan Kumar
Pavan Kumar 2015-2-2
Hii Torsten,
your advise really helped. Thanks a trillion bro...
Pavan

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更多回答（1 个）

Sara
Sara 2015-1-27
ode45(@(t,x)DFG789(t,x,var_1),.....
Then the function becomes:
function dB = DFG789(Z1,B,var_1)
  1 个评论
Pavan Kumar
Pavan Kumar 2015-1-28
编辑：Pavan Kumar 2015-1-28
Hii Sara, Thanks for the advise.
I made the following changes
[Z1,B] = ode45(@(t,x)DFG789(t,x,delk),[0 3],[(0.1) 0 1],delk); and
function dB = DFG789(Z1,B,delk)
However, when i try to execute
plot(delk,abs(B(:,1)).^2);
i get the following errors. What can i do?

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