×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Matrix calculations in MathCAD

Matrix calculations in MathCAD

Matrix calculations in MathCAD

(OP)
Hello there,

I am using MathCAD2000 professional.
I was wondering if it is possible to do Matrix in Matrix calculations in MathCAD. I was trying to compute some Voltages on Transmission Lines and all i got was "This expression must be a scalar"

What i did:

V=[ [E]+[rs]    0     ]*([D]^(-1))*[VS]
    [    0      [E]+[rl] ]

Where [E],[rs],[rl] are 2x2 matrices with scalar valus
[D] is a 2x2 matrix where every element is another 2x2 matrix with scalar values
[VS] is a 2 row vector, where each element is a complex number.
i can calculate every matrix on its own, but not connect them with each other.

Currently I am at a point where I have knops in my brain.
Does anybody has a clue how to solve this?

Thanks in Advance

Daniel

RE: Matrix calculations in MathCAD

Perhaps this might be of help.
Drop this into your browse's Address box.
http://collab.mathsoft.com/upload/2001i_Matrix_nested_return.mcd

RE: Matrix calculations in MathCAD

Dan,

Have you used the HELP function in Mathcad to investigate "Nested Arrays"  ?

RE: Matrix calculations in MathCAD

Dan:
Here's another reference that may be useful to you.

Advanced: Nested Arrays in Mathcad
By Krista Carven and Jon Fournier


"Mathcad supports nested arrays.  However,  they cannot be defined or accessed using the standard three subscript form, Mi,j,k.  Each k dimension of the array has to be created individually."

( see link below)

http://www.mathcad.com/support/item/examples/Nested_aug01.mcd

RE: Matrix calculations in MathCAD

(OP)
Thanks for your answers,

it worked by defining each element of each matrix on its own
like in the mathcad files above. Thanks alot

Do you know how i can use a function (dependence of frequency) in the matrices? When I try it, MatchCAD just says: The function on the left cannot be defined.

Greets

Daniel

RE: Matrix calculations in MathCAD

Daniel,
This is a poor forum for trying to work thru problems with Mathcad useage. It doesn't not support display of work sheet or samples thereof.

Would very much suggest that you post to the Mathcad Collabratory ... there you can attach your worksheet for others to see and respond in kind to.

http://collab.mathsoft.com/~mathcad2000/

I would suggest further that you post to the Electrical forum therein.

Seems that I saw something in the Collab recently about your latest question. If I find it... I'll post to you here.

HTH
jOmega

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources