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IN_Naga8-Gravel
8-Gravel
Mar 25, 2025 7:27 AM UTC
Solved

PTC Mathcad Express _ Prime 10.0.0.0 _ Percentage Calculation showing wrong reults

Hello All,

 

I am attempting to find the percentage deviation of the calculated output.

However, in Mathcad Prime, the calculation using matrix indices is producing incorrect results.

What could be causing this issue?

 

In the attached screenshot, the output calculation in green font is correct and was done manually, while the output calculation in red font is incorrect and was done using the matrix indices formula.

IN_Naga_0-1742886727289.png

I have attached the .mcdx file with my calculations for your reference.

I would greatly appreciate a quick resolution to this problem.

 

Thanks in Advance.

 

 

 

terryhendicott
terryhendicottAnswer
21-Topaz II
Mar 25, 2025 7:33 AM UTC

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4 replies

terryhendicott
terryhendicott21-Topaz IIAnswer
21-Topaz II
Mar 25, 2025 7:33 AM UTC

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    IN_Naga8-GravelAuthor
    8-Gravel
    Mar 26, 2025 6:35 AM UTC

    Thank you for your reply. I got clarification.

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    Werner_E
    Werner_E25-Diamond I
    25-Diamond I
    Mar 25, 2025 7:39 AM UTC
    In the attached screenshot, the output calculation in green font is correct and was done manually, while the output calculation in red font is incorrect and was done using the matrix indices formula.

    On contrary -  Primes "red font" calculation is the correct one!

    Your manual calculation uses just values rounded to three decimals - hence the difference in the results.

    If you use the exact values, the manual calculation agrees with Prime's results:

    Werner_E_0-1742888375629.png

     

    By default Prime shows three decimals in results. This can be altered - either for a single result or for all results in the sheet (which have not been formatted manually) depending on where the cursor is placed while you change the setting.

    Werner_E_0-1742888631117.png

     

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      IN_Naga8-GravelAuthor
      8-Gravel
      Mar 26, 2025 6:37 AM UTC

      Thank you for your reply.

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