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Bogdan_d10-Marble
10-Marble
April 11, 2023
Solved

MathCAD example not working corectly

  • April 11, 2023
  • 1 reply
  • 1494 views

I am trying to do a example from the MathCAD example "Generating Random Numbers"

and it doesn't work properly. The norm function it doesn't show the proper plotting.

Also the other examples from the tutorial, are hard to be plotted: scalar representation versus array.

If you do a new version of software why there are no updates in the examples provided to reflect the version and changes in the software updates.

Nevertheless in the example are some mistakes in the variable names that I correct them.

It is something there, that I am doing wrong?

 

 

 

Best answer by Werner_E

1) When you define the range "n", don't follow the definition with an inline evaluation but rather evaluate "n" in a separate region. Using the inline evaluation turns the range into a vector which can't be used as a matrix/vector index (see below)

Werner_E_0-1681215318333.png

2) Prime offers two subscripts/indices and you used the wrong one throughout. You used the literal subscript which you als get using "Ctrl -" which is just part of a variable name. Thats also the reason you could not simply use "x" of "F" as in the example because you got the error message that the variable is not defined.
You have to use the vector/matrix index instead. Doing so defines vectors "x", "F", etc. and not simple scalars.

Werner_E_1-1681215603640.png

 

3) You had a typo when you defined "int". You wrote "n" instead of "w".

Werner_E_2-1681215706738.png

Once these errors are corrected you get the desired result as in the help pages.

Werner_E_3-1681215772717.png

Corrected sheet in Prime 9 format attached

 

1 reply

W
Werner_E25-Diamond IAnswer
25-Diamond I
April 11, 2023

1) When you define the range "n", don't follow the definition with an inline evaluation but rather evaluate "n" in a separate region. Using the inline evaluation turns the range into a vector which can't be used as a matrix/vector index (see below)

Werner_E_0-1681215318333.png

2) Prime offers two subscripts/indices and you used the wrong one throughout. You used the literal subscript which you als get using "Ctrl -" which is just part of a variable name. Thats also the reason you could not simply use "x" of "F" as in the example because you got the error message that the variable is not defined.
You have to use the vector/matrix index instead. Doing so defines vectors "x", "F", etc. and not simple scalars.

Werner_E_1-1681215603640.png

 

3) You had a typo when you defined "int". You wrote "n" instead of "w".

Werner_E_2-1681215706738.png

Once these errors are corrected you get the desired result as in the help pages.

Werner_E_3-1681215772717.png

Corrected sheet in Prime 9 format attached

 

    B
    Bogdan_d10-MarbleAuthor
    10-Marble
    April 12, 2023

    Hi Werner_E,

    Thank you a lot for your quick reply and explanation.

    Now is working.

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