I am new to SMATH as a previous post indicated. I really need help with programming.

Here is a program I wrote several years ago. It takes almost 20 seconds to run. Scroll down to the section with the nested for-loops in the program. It is a program for coupled finite difference equations.
File non trovato.

When I was working on this, someone on the forum modified the code as follows so that it runs instantly. I cannot find the difference because I pasted in from this program its nested for-loops to the above one and got no improvement in runtime. What is the difference?
File non trovato.

I am trying to get this much simpler program to run. It seems to be in an endless loop. At least it hasn't finished after several minutes. In Mathcad 15 it runs instantly. I tried to copy the syntax from the above program. Where am I going wrong?
File non trovato.

Thank you for any help you can give.
Reg Curry

Wrote

Thank you for any help you can give.

You can make it piece wise ... first.
Cheers ... Jean.

System of Equations (1).sm (32,85 KiB) scaricato 1448 volta(e).

Wrote

File non trovato.

SMath isn't very fast. Sometimes works putting some eval() function or choosing Optimization / Numeric, but not always.

Wrote

File non trovato.

The difference is that in the first length(t) = 160 and 15 in the second.

Wrote

File non trovato.

if you start the loop from j = 1, then S[j-1] is S[0], and SMath have only ORIGIN = 1.

Best regards.
Alvaro

... Project REG Unk.sm (12,24 KiB) scaricato 1506 volta(e).

Thanks

Origin = 1 was the problem. It’s hard not to let MATHCAD affect my syntax.