proc iml regression

[alunbrain]

Hi
I am having trouble with proc iml.

basic equation id
- - --- --- -- -
|x | |a1 b1 c1 d1 e1 | | f |
|y | = |a2 b2 c2 d2 e2 | | g |
|z | |a3 b3 c3 d3 e3 | | h |
- - --- --- | i |
| j |

This would be my equation for one month, then this will be provide different figures for the month after and so on.

I can solve this as an equation, but the figures change by month. So I would like to generate a regression formula for x, y and z

- - -- ---
|x |= |a1f + b1g + c1h + d1i + e1j + intercept |
|y |= |a2f + b2g + c2h + d2i + e2j + intercept |
|z |= |a3f + b3g + c3h + d3i + e3j + intercept |
- - --- ---

hope I am making some sense
cheers

Alun