loops, matrices and coupled equations

Katharina Hunger wrote: Hi everybody, with the help of Stuart Bruff I managed to get the file I uploaded here. Now I have a task, but don`t know if it is possible in MathCad, and when it is - how... I wish to iterate the four constants (kic, kisc1, kisc2 and kQ) over a certain range, solve the set of equations and write the matrix (kic kisc1 kisc2 kQ Rqt) for each possible set of these k`s into a file. What I managed up to now is the variation of all k`s with l1, but I want to change them independently. My first try was to use several for-loops (one for each k), but I had too many problems and nothing did work, so I have nothing to show here. Can anybody tell me if I should try further on, or if I can stop because it isn`t possible at all? Thank you in advance, Katharina

Hi Katharina,

I haven't had time to look at the bit of the worksheet that reads/writes from file, but is the bit at the bottom of the attached worksheet sort of what you're after for the iteration over variables?

It uses a utility function, vec, that I wrote to quickly generate sequences. I'm not sure if it works in your version of Mathcad. If not, it should be fairly easy to replace it.

This would probably be a lot easier, and more general, if Mathcad had a proper multi-dimensional array facility (particularly indexing), but a lot can be done with nested arrays.

Stuart