Getting Started Example for PROC NLIN
/****************************************************************/
/* S A S S A M P L E L I B R A R Y */
/* */
/* NAME: nlings */
/* TITLE: Getting Started Example for PROC NLIN */
/* Estimating the Parameters in the Nonlinear Model */
/* PRODUCT: STAT */
/* SYSTEM: ALL */
/* KEYS: Nonlinear regression */
/* Enzyme reaction model */
/* PROCS: NLIN */
/* DATA: */
/* */
/* SUPPORT: Oliver Schabenberger */
/* REF: */
/* MISC: */
/****************************************************************/
data Enzyme;
input Concentration Velocity @@;
datalines;
0.26 124.7 0.30 126.9
0.48 135.9 0.50 137.6
0.54 139.6 0.68 141.1
0.82 142.8 1.14 147.6
1.28 149.8 1.38 149.4
1.80 153.9 2.30 152.5
2.44 154.5 2.48 154.7
;
proc nlin data=Enzyme method=marquardt hougaard;
parms theta1=155
theta2=0 to 0.07 by 0.01;
model Velocity = theta1*Concentration / (theta2 + Concentration);
run;
proc nlin data=Enzyme method=newton listcode;
parms x1=4 x2=2;
model Velocity = x1 * exp (x2 * Concentration);
run;