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JJ_90945001-Visitor
1-Visitor
January 28, 2022
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Finding the Max Value from Part of a Matrix

Please see the attached file. I need a simple and elegant solution for finding the max value from part of a single column matrix. Thanks

JJ_9094500_0-1643366753873.png

 

StuartBruffAnswer
23-Emerald V
January 28, 2022

Here are some variants on the answers already given plus an additional one that allows you to choose whichever elements you want from A.

 

Note that the functions were written in Mathcad Prime Express 7.  Express does not have programming and so breaks a function down into a sequence of successive (functional) steps.

 

StuartBruff_0-1643391811477.png

 

StuartBruff_1-1643391869900.png

StuartBruff_3-1643392064988.png

 

 

Mathcad Prime Express 7 worksheet attached.

 

Stuart

 

 

 

 

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9 replies

ttokoro
ttokoro21-Topaz I
21-Topaz I
January 28, 2022

image.pngimage.png

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t.t.
    MartinHanak24-Ruby III
    24-Ruby III
    January 28, 2022

    Hi,

    MartinHanak_0-1643377767233.png

     

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      LucMeekes23-Emerald IV
      23-Emerald IV
      January 28, 2022

      Or, in one go, and irrespective of the value of ORIGIN:

      LucMeekes_1-1643381972237.png

      Prime4 file attached.

       

      Success!
      Luc

       

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        KevinFinity12-Amethyst
        12-Amethyst
        January 28, 2022

        KevinFinity_0-1643391505699.png

         

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        StuartBruff23-Emerald VAnswer
        23-Emerald V
        January 28, 2022

        Here are some variants on the answers already given plus an additional one that allows you to choose whichever elements you want from A.

         

        Note that the functions were written in Mathcad Prime Express 7.  Express does not have programming and so breaks a function down into a sequence of successive (functional) steps.

         

        StuartBruff_0-1643391811477.png

         

        StuartBruff_1-1643391869900.png

        StuartBruff_3-1643392064988.png

         

         

        Mathcad Prime Express 7 worksheet attached.

         

        Stuart

         

         

         

         

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        MichaelW17-Peridot
        17-Peridot
        February 8, 2022

        Hello, I can confirm that submatrix() and programs are applicable and are the intended approach.

         

        However, getting back to initial request to "simple and elegant solution": Utilizing simple Mathcad definition capabilities, please compare this:

         

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        StuartBruff23-Emerald V
        23-Emerald V
        February 8, 2022

        See the second line in my response - the shuffle was just there to randomize the data for test purposes (and provide a function that is potentially useful in other circumstances).  

         

        https://community.ptc.com/t5/PTC-Mathcad/Finding-the-Max-Value-from-Part-of-a-Matrix/m-p/775291/highlight/true#M199539

         

        (the image is just a continuation of the OP's original)

         

        Stuart

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        MichaelW17-Peridot
        17-Peridot
        February 8, 2022

        Well I see. Thank you for the reminder.

        Seems that the initial post caused a lot of elegant and other related solutions.

        I'd say that this solves the issue anyway.

        What you think?

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