Helo Everyone!

I have one question: imagine the matrix of size 15x15 filled with zeros. I want to put smaller matrix 5x5 to the bigger one but from column 2 to 6 and to rows 4 to 8. How can I do this?

Hello [USERLINK]rafalSM[/USERLINK],

You can use a loop: example

Oh, thank You a lot. It seems that this activity is much more complicated than in case of MathCad. But where can I take function "merge" from?

It is the first function in the worksheet linked above (you can download it and copy the function in your own worksheet)

How it works in Mathcad?

I attached a pdf file (polish language ) which presents calculations of critical factor "alfa cr" for steel frame (see: Eurocode 1993-1-1). The most interesting formulas can be found on page 10 of this document.

projekt16.pdf (320,76 KiB) scaricato 957 volta(e).

... next: try NOT to isolate "M"

Wrote

but from column 2 to 6 and to rows 4 to 8

Please note that SMath's count of rows/columns starts from 1, not 0 (as your question implied).

Wrote

Please note that SMath's count of rows/columns starts from 1, not 0 (as your question implied).

Quite right:

Davide "merge" is Smath style based on index ORIGIN = 1
Jean "replace" is Mathcad style based on default ORIGIN = 0

Converting your *.PDF [Mathcad] to Smath looks quite an entreprise.
In the mean time, the "Matrix Treasury" may content useful modules.

Jean

Utilities Matrix Treasury Copy.sm (315,54 KiB) scaricato 1403 volta(e).

Wrote

It is the first function in the worksheet linked above (you can download it and copy the function in your own worksheet)

How it works in Mathcad?

But you was able to create such a type of function. How did you do it?

Wrote

But you were able to create such a type of function. How did you do it?

Something I don't understand: OK you are new to Smath and presumably you
may not be familiar about it. The Mathcad PDF, did you do it yourself ?
If so: you are already in Smath. Am immense amount of Mathcad stuff is
convertible in Smath by many similarities in the programme code and
algorthmic construction. I glanced through the PDF and noticed "eigvec
& eigval". If you need, there is an Smath document doing.

Cheers, Jean