How to solve a non-standard PDE using MATLAB pde-toolbox?

2013 10 30
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更新时间：2013 11 1
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I need to solve a pde of the form: p*d2u/dx2 + d2u/dy2 -q*u = r*du/dx + s*x*du/dy
where p, q, r, s are constants.
The pdetool does not allow to enter different coefficients for the separate second order terms. Is it possible to enter different coefficients for the separate second order terms via command-line?
Thanks in advance.

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Bill Greene
Bill Greene 2013-10-31

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For a single dependent variable like you have, the c-coefficient can be a 2x2 matrix. That is explained on this documentation page:
http://www.mathworks.com/help/pde/ug/scalar-coefficients-in-string-form.html
For your case, it looks like the best way to define that is:
c = -[p 1]';
Bill

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