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SK_103360457-Bedrock
7-Bedrock
Aug 18, 2022 8:08 AM UTC
Solved

Cannot understand this syntax

Hi. 

 

Im kind of new to mathcad and im trying to make a function whitch can calculate the equivalent line load for a road. I have used a document which has the calculation i need, but unfortunately it does not work for me. 

 

Can any of you see what is wrong, thanks in advance. 

 

 

SK_10336045Answer
7-Bedrock
Aug 18, 2022 8:36 AM UTC

Hi thanks for the reply. I have manage to get somewhat in the right direction.

This Is where I am now. Its says that the variable is undefined.

upload_-aW1hZ2UwMDEucG5n-9197527451125744619..png

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6 replies

LucMeekes23-Emerald V
23-Emerald V
Aug 18, 2022 8:32 AM UTC

1.

You've types square brackets in a simple expression. Square brackets cause the creation of an array (vector or matrix). I don't think you want an array there:

2.

You've enclosed an assignment in brackets. That is what the error message points to. What exactly is the assignment you want to make to the elements of the arrays X and Y?

3.

The first index into an array is set by the Built-in variable ORIGIN. ORIGIN = 0 in your sheet, but your program/function assumes it's 1...?

 

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    SK_103360457-BedrockAuthorAnswer
    7-Bedrock
    Aug 18, 2022 8:36 AM UTC

    Hi thanks for the reply. I have manage to get somewhat in the right direction.

    This Is where I am now. Its says that the variable is undefined.

    upload_-aW1hZ2UwMDEucG5n-9197527451125744619..png

    Translate
    LucMeekes23-Emerald V
    23-Emerald V
    Aug 18, 2022 8:38 AM UTC

    You should attach the worksheet,

    Your expressions suggest that x is an array. The unknown variable is x.k (x with subscript k , instead of the k'th element of x. You should type x[k to get that, not x [Ctl _] k )

    Note that you supply y as a formal parameter to the function but you do not use it...

    Your utdata attempts to use the transpose of the vectors X and Y. You CANNOT use an exponent T to get the transpose. Check the Operators for the transpose operator.

    After some editing I got this.

    LucMeekes_0-1660813290572.png

    Is this what you would expect?

     

    Success!
    Luc

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