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gmermiris1-Visitor
1-Visitor
Jul 16, 2015 1:03 PM UTC
Question

odesolve errors

I am using mathcad prime 3.1 and trying to solve a system of two 1st order ODEs with the odesolve command. I define the ODEs both in an explicit manner as well as in matrix form. In the first case the error that occurs is "Unable to form the derivative matrix" and in the second case "there are too few equations".

Attached is a copy of the file I am working on. Any help and ideas would be highly appreciated.

Many thanks,

George

4 replies

VladimirN24-Ruby IV
24-Ruby IV
Jul 21, 2015 7:38 AM UTC

For the future - in addition to the Mathcad Prime 3.1 worksheet don't forget to upload its version in PDF or XPS format for viewing those users who use a lower version of Mathcad Prime (3.0/2/1).

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AlanStevens19-Tanzanite
19-Tanzanite
Jul 21, 2015 10:57 AM UTC

I don't have Prime 3, but I've attached a solution in Prime 2, together with a pdf file and the images below.  Hopefully one or more of these might help!

Alan

ode1.PNG

ode2.PNG

ode3.PNG

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    StuartBruff23-Emerald V
    23-Emerald V
    Jul 21, 2015 1:35 PM UTC

    You may find the following thread on Eng Tips to be of some use as well.

    Stuart

    System of 2 second order coupled differential equations with Mathcad - PTC: Mathcad - Eng-Tips

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      gmermiris1-VisitorAuthor
      1-Visitor
      Jul 23, 2015 8:28 AM UTC

      Many thanks for the effort, contribution and ideas to all!

      Best regards,

      George

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