I have say, 4 matrix, size of (nr, nz). I am trying to do initiation of these 4 matrix, vs, vb, Cs, Cb. In mathcad, you create a matrix of 4 column and 1 row, representing these 4 matrix, and initiate with for loop.


Smath didn't show any errors. But when I tried to display the values of one matrix, say, vs=, nothing show up.

I thought Smath might treat all variables as global variable, so, I tried anther way:


Then the error showed up, "requested matrix element doesn't exist".

Do I really have to create vs, vb, Cs, Cb before I initiate them?

It is a very simple problem, but I really need help.

By the way, the tutorial is slightly different from reality in "range". When I define for loop ranges, such as [for i "belong" 0..100], the tutorial shows using range2 to choose (0,100), the context will show as above, but the reality will show [for i "belong"[0..100]], a bracket was added. I hope I used the range function properly.

Thanks!

Hi. SMath matrix index starts at 1, not at 0. If you want to translate Mathcad code into SMath, try to use ORIGIN:=1 in Mathcad, because x[0] always gives an error in SMath.

Best regards.
Alvaro.

Wrote

Hi. SMath matrix index starts at 1, not at 0. If you want to translate Mathcad code into SMath, try to use ORIGIN:=1 in Mathcad, because x[0] always gives an error in SMath.

Best regards.
Alvaro.

Thanks a lot. Following your instructions, I started to initiate from 1, using the 2nd picture, instead of 0. It worked.

As side note, you might initialize you matrices even like this:

Wrote

Then the error showed up, "requested matrix element doesn't exist".
Do I really have to create vs, vb, Cs, Cb before I initiate them?
It is a very simple problem, but I really need help.

That's what you have in my reply