MATLAB: SYMBOLIC system of equations

solvesymbolicsystem equations

Hello,

I'd like to know if there's a way in MATLAB to solve a symbolic system of equations with symbolic coefficients ?

Thanks for your help.

Best Answer

Yes, the symbolic math toolbox will do this. Type mupad at the matlab command prompt, then dig into the help files and documentation to find your feet.

Overview and examples here:

http://www.mathworks.co.uk/products/symbolic/examples.html

http://www.mathworks.co.uk/discovery/mupad.html

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MATLAB: Question regarding dsolve and subs (symbolic toolbox)

subs() has to work on symbolic expressions, but you are passing in a string instead. Also the new value has to be symbolic or numeric. You should use

eqn1 = subs(sym('D2x+a'), a, c+b+d);

MATLAB: Telling MuPad that Symbolic Variable is a Matrix and not a Scalar (Symbolic Matrix Operations)

Which release do you have? If you have 2010b or later, you can do it, provided you assign specific dimensions: see the documentation for sym

That method is new for 2010b; before that you have to assign it a matrix of symbolic values, such as I show here

Best Answer

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MATLAB: Question regarding dsolve and subs (symbolic toolbox)

MATLAB: Telling MuPad that Symbolic Variable is a Matrix and not a Scalar (Symbolic Matrix Operations)

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