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A
Ali_Ihsan1-Visitor
1-Visitor
January 15, 2022
Solved

Issue with plot - These array elements must be scalars. They cannot be vector or matrix

  • January 15, 2022
  • 2 replies
  • 3364 views

Hi,

 

I have just started using Prime 7 instead of Mathcad 15 and have to convert all my files. The issue is after solving a system of equations, the solutions I get are part of the solution vector I guess. I can perform calculations but cannot plot due to the error mentioned in the title. I have seen similar topics here, but I cannot find a way to solve my issue. I figure it is simple and straightforward.

 

The file

is attached.

 

Thanks in advance.

Ali

 

Best answer by terryhendicott

Hi,

Matrices of one element are formed as part of the calculations.

Capture2.JPG

Simply use the zero index to get a number for a and a complex number for d.

Capture.JPG

 

 

2 replies

T
21-Topaz II
terryhendicott21-Topaz IIAnswer
21-Topaz II
January 15, 2022

Hi,

Matrices of one element are formed as part of the calculations.

Capture2.JPG

Simply use the zero index to get a number for a and a complex number for d.

Capture.JPG

 

 

    A
    Ali_Ihsan1-VisitorAuthor
    1-Visitor
    January 15, 2022

    Thanks a lot. I understand now. If may ask, how do I modify the graph to change the number of ticks, labels, legend,s etc. the plot bar seems quite limited.

    T
    21-Topaz II
    terryhendicott21-Topaz II
    21-Topaz II
    January 15, 2022

    Thanks a lot. I understand now. If may ask, how do I modify the graph to change the number of ticks, labels, legend,s etc. the plot bar seems quite limited.

     

    There are two ways to plot in Prime.  

    a) Plots | Traces | Insert Plot -> This gives you the plot type used.

    Capture.JPG

    b) Math | Regions | Chart Component -> This gives a more adjustable plot.

    Capture2.JPG

    The chart component when you double click it brings up the edit window of the plot.

    In edit window you can change number of ticks, add labels, add legends etc

     

    I have added a chart component in the file to show you.

    Capture3.JPG

    Capture4.jpg

    Cheers

    Terry

     

    Cheers Terry

     

     

      W
      Werner_E25-Diamond I
      25-Diamond I
      January 15, 2022

      You used the column selector to access the individual elements of the 1 x 4 matrix calculated by MM(Gamma,kL).

      Werner_E_0-1642247831232.png

      That way you always get a column, a matrix, even if its only one row high (1 x 1 matrix).

       

      You should rather use normal matrix indices

      Werner_E_1-1642247879259.png

      or you may also assign the output of MM(Gamma,kL) to a 4 x 1 matrix of individual variables:

      Werner_E_2-1642247946938.png

       

       

       

        A
        Ali_Ihsan1-VisitorAuthor
        1-Visitor
        January 15, 2022

        This work as well. I understand the underlying issue now. Thanks a lot. I appreciate the help.

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