Formula for matrix production

[Ivan_Pat]

Hi there!

I have an issue with the definition of the Prime user function.

There are several matrices 2*2 in the general case ( the exact matrix number oscillates from 1 to 4-5-6).

Each matrix has a lowercase index (connected to the data from the parameters table). I want to define user function to make matrix production. Due to my modest coding skills, I have no results to describe as appropriate. The relevant search on the forum gave some material but didn't seem to help. 

https://community.ptc.com/t5/Mathcad/Production-of-Matrices-Elements/m-p/676964 

In the attachment, there is my problem sample, performed in Prime 10.0.0

Any assistance would be appreciated!

[LucMeekes]

Try this:

Success!
Luc

[Ivan_Pat]

@LucMeekes

Thanks, but this is beyond my level of understanding...🙈

By the way, paid attention to the similarity to the IF condition in my second reply...

[ttokoro]

[Ivan_Pat]

@ttokoro Thank you for such an elegant piece of code solution!

[Ivan_Pat]

Thank you for your support and understanding dear Luc. I just want to know, why I cannot see this post at PC after you picked a picture of how matrix product could be programmable solved.

I reply from my cellphone.

[LucMeekes · Accepted solution]

This also works:

Success!
Luc

[Ivan_Pat]

@LucMeekes Thank you, it helped!

I modified your code with the IF condition a little for A=1.