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AlanElmer1-Visitor
1-Visitor
July 23, 2010
Solved

Given/Solve error - result returned too large to display

  • July 23, 2010
  • 25 replies
  • 16180 views

I am working with some students to try and solve a system of three equations using a Give/Solve block. Mathcad 14 is solving, but we are getting an error that says, "The symbolic result returned is too large to display, but it can be used in subsequent calculations if assigned to a function or variable."

Can someone help us out?

Thanks,

Alan

Best answer by MikeArmstrong

Alan Elmer wrote:

I am working with some students to try and solve a system of three equations using a Give/Solve block. Mathcad 14 is solving, but we are getting an error that says, "The symbolic result returned is too large to display, but it can be used in subsequent calculations if assigned to a function or variable."

Can someone help us out?

Thanks,

Alan

Alan,

Break it down see attached.

Mike

25 replies

MikeArmstrong1-VisitorAnswer
1-Visitor
July 23, 2010

Alan Elmer wrote:

I am working with some students to try and solve a system of three equations using a Give/Solve block. Mathcad 14 is solving, but we are getting an error that says, "The symbolic result returned is too large to display, but it can be used in subsequent calculations if assigned to a function or variable."

Can someone help us out?

Thanks,

Alan

Alan,

Break it down see attached.

Mike

    AlanElmer1-VisitorAuthor
    1-Visitor
    July 26, 2010

    Perfect!!! Thanks for uploading the file, that made life much simpler!!!.

    Alan

    jeanGiraud1-Visitor
    1-Visitor
    July 24, 2010

    *.zip problem is unviable.

    As soon as the Mathcad zip is open it crucifies Mathcad

    it returns Mathcad and all the box to the gear speed

    fractional 0 [zer]., like a tired turtle !

    jmG

    AlanElmer1-VisitorAuthor
    1-Visitor
    July 26, 2010

    Didn't understand your response, but the attached .gif made sense.

    Thanks,

    Alan

    jeanGiraud1-Visitor
    1-Visitor
    July 29, 2010

    Alan,

    While trying to read some reply on that, this morning, the click didn't send me to the appropriate reply but back to your very original request, to which I'm actually replying. Nothing wrong with your symbolic attempt, nothing wrong because it would plug automatically the coefficients of the unknowns. That is college level, not a critic. The other way that is a lot more advanced and simpler in term of the burden to setup a model solution, this simpler way is applying the rref(,) matrix solver. In the attached, I have faked the valued coefficients of each term as a demo. However, the setup is like a model solution, generalised and valid for all cases, whether the system may have different solutions [unique, infinitely many ... ]. From the educative step where you are actually to the new step the rref solver is driving the classroom, this new step is also educative and will be very profitable for the future. Things didn't grow wings since my times, but they have moved quite a distance and available to a wider class of users than it was 3 decades ago ! Visit the work sheet posted this morning "The rref solver". Look how easy it is to administrate a collection of n x n system.

    jmG

    AlanElmer1-VisitorAuthor
    1-Visitor
    July 29, 2010

    Thanks for the reply. It has been a long time since I have done LU decomposition. Using rref() seems to only work numerically and not symbolically. The exercise was symbolic, but I will show them rref use where they can check their answers.

    Thanks,

    Alan

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