Inclusion of Analytical Expressions in NONMEM control file

Georgios The most straightforward way (and the only way I know of) to do this is to call an external fortran subroutine. Pretty easy to call it (just include it in the $SUBS). I've never done a real analytical solution (like root finding or something), but I've done simple search algorithms. I'm sure I don't have the code anymore though, it really is pretty easy. Mark Dear NONMEM users Has anyone ever tried to include analytical expressions within a control file in NOMEM? I guess that would obviously imply the use of a routine alternative to the $DES. I’d appreciate if you could provide me with some tips or a short example on that. Many thanks in advance, Georgios Mark Sale MD President, Next Level Solutions, LLC www.NextLevelSolns.com 919-846-9185 A carbon-neutral company See our real time solar energy production at: http://enlighten.enphaseenergy.com/public/systems/aSDz2458