In a symbolic expression, how can I extract all terms that have a common specific variable?
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Hello,
In a symbolic expression, is there a way to extract all terms that have a common specific variables? For example, if I have the symoblic function
dxdt = f(a,b,c)*x1+f(a,b,c)*x2+f(a,b,c)*x1+f(a,b,c)*x3+...
Is there a way to extract all terms in dxdt that have x1 in them? I'm looking to try to put my expression dxdt in standard state space form. (My symbolic function can be very lengthy, so using the simplify function is not necessarily grouping all the x1 terms together.)
Thank you, Kevin
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