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Best answer by terryhendicott

Hi,

Just get rid of the inline equals.

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3 replies

T
21-Topaz II
terryhendicott21-Topaz IIAnswer
21-Topaz II
April 9, 2025

Hi,

Just get rid of the inline equals.

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    F
    fahmed-214-AlexandriteAuthor
    14-Alexandrite
    April 9, 2025

    I am trying to icorporate the last range value from delta_z but not working @terryhendicott 

     

    fahmed2_0-1744229029480.png

     

    F
    fahmed-214-AlexandriteAuthor
    14-Alexandrite
    April 9, 2025

    Thank you so much @terryhendicott 

    W
    Werner_E25-Diamond I
    25-Diamond I
    April 9, 2025

    It has often proven that inline evaluations (evaluating a value in the same region where you define it) is something which is better avoided in Mathcad/Prime and that you are better off to put definition and evaluation in two different regions.

    Nonetheless I would call what you experience a bug in Prime (it works OK in real old Mathcad = Mathcad 15, 14,.. and also in older Prime versions - at least it works OK in P6) and so you may consider reporting it to official PTC support by opening a support case.

    As far as I remember this bug popped up here in the forum already in the past now and then.

    Solution/workaround is to avoid inline evaluation and evaluate the range variable in a separate region.

    Werner_E_0-1744229335248.png

     

    BTW, doing what you did - defining a range variable and using inline evaluation was an undocumented way to turn a range into a vector. 

    This convenient option was deliberately made unfeasible by PTC in version 10 because it contradicts the logic that an evaluation changes the data type. Unfortunately, the built-in ‘vec’ function is only now being supplied as an alternative in version 11.
    But this change should not be the reason for the bug, because it is already present in version 9, but not yet in version 6!

     

    F
    fahmed-214-AlexandriteAuthor
    14-Alexandrite
    April 9, 2025

    Thank you, how should i refer the last i-th number of the range then since "last()" is not working

    W
    Werner_E25-Diamond I
    25-Diamond I
    April 9, 2025
    @fahmed-2 wrote:

    Thank you, how should i refer the last i-th number of the range then since "last()" is not working

    Why would you do so?

    A range is not a collection of numbers like a vector but rather kind of an implicit loop.

    last() is used to get the last index in a vector, a range not being a vector does not consist of numbered values.

     

    It depends on what your final goal is but maybe you need to turn the range into a vector. In Prime 11 you may use the new built-in function "vec" to do so, in Prime 10 you may use one of the various "vec" function which were posted here in the forum by various people.

    A simple version is shown in the picture below

    Werner_E_0-1744236346920.png

     

     

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