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Math Help - Basic MATLAB questions

  1. #1
    Member Altair's Avatar
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    Basic MATLAB questions

    1.If I am given a transfer function in factorized form e.g (s+1)(s+2)/(s+2j)(s-2j)(s+3) then by which command or set of commands can I get it converted into the polynomial form like A(s)/B(s) ?

    2. How can I find characteristic equation of the above example? Like its a polynomial fraction so how do I handle it ?
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  2. #2
    Grand Panjandrum
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    Quote Originally Posted by Altair View Post
    1.If I am given a transfer function in factorized form e.g (s+1)(s+2)/(s+2j)(s-2j)(s+3) then by which command or set of commands can I get it converted into the polynomial form like A(s)/B(s) ?

    2. How can I find characteristic equation of the above example? Like its a polynomial fraction so how do I handle it ?
    This is not a question about matlab, but about the symbolic toolbox which is a fronm end to the Maple engine.

    Google for "matlab symbolic toolbox help" then look at the hits, the first one is the Matlab documentation for the toolbox.

    CB
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  3. #3
    Member Altair's Avatar
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    And where do I go from there ? I thought tha like 'roots' gives roots of the polynomial so something like that could be done in inverse...please explain...
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  4. #4
    Member Altair's Avatar
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    Actually I am new to MATLAB and I want to know te exact steps in finding a characteristic equation...
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