How to input crank nicolson into matlab?

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Conrad Suen
Conrad Suen 2016-2-9
回答： Bjorn Gustavsson 2016-5-11
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I am at a loss on how to code these to solve in the Crank Nicolson equation. I have solved the equations, but cannot code it into matlab.

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回答（4 个）

Conrad Suen
Conrad Suen 2016-2-9
Conrad Suen
Conrad Suen 2016-2-9
This is the code and errors I am getting.
simopera6
simopera6 2016-5-11
编辑：simopera6 2016-5-11
Hi Conrad, If you are trying to solve by crank Nicolson method, this is not the way to do it. You have to solve it by tri-diagonal method as there are minimum 3 unknowns for the next time step. There are many videos on YouTube which can explain this. Hope this helps. If you can post a code after doing this, we can have a look at it. Best,
Bjorn Gustavsson
Bjorn Gustavsson 2016-5-11
Crank-Nicolson is for partial differential equations, this seems to be ordinary differential equations. Perhaps try matlabs ode23 et al.
HTH

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