It is perfectly legal to include -cond()- within the <sexp> in
nl (depvar=<sexp>) [if] [in] [weight] [, options]
if that is what you mean. But -mkspline- followed by -regress- sounds
much easier here.
On Mon, Dec 3, 2012 at 9:59 AM, David Raitzer <raitzer2002@yahoo.com> wrote:
I am trying to do a segmented linear regression with the nl function
and cond. The intention is to have two breakpoints and 3 segments,
which means that 3 conditions are required. Can cond be nested
within nl to apply more than 2 conditions? If not, what is the best
way to approach such a regression when the segmentation depends upon 3
ranges of an x, rather than only 2? Thanks!
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