* A * ( 1 - EXP(-B*x) ).
* NonLinear Regression.
MODEL PROGRAM c0=2.43 A=7.55 B=0.058 .
COMPUTE PRED_ = A * ( 1 - EXP(-B*x) ) - c0.
NLR c
  /OUTFILE='C:\SPSSFNLR.TMP'
  /PRED PRED_
  /CRITERIA SSCONVERGENCE 1E-8 PCON 1E-8 .

* A * ( 1 - EXP(-B*t) ).
* NonLinear Regression.
MODEL PROGRAM c0=8.18 A=16.76 B=0.52 .
COMPUTE PRED_ = A * ( 1 - EXP(-B*t) ) - c0.
NLR c
  /OUTFILE='C:\SPSSFNLR.TMP'
  /PRED PRED_
  /CRITERIA SSCONVERGENCE 1E-8 PCON 1E-8 .

* A * ln(1 + (B*t))
* NonLinear Regression.
MODEL PROGRAM c0=5 A=10 B=1 .
COMPUTE PRED_ = A * ln(1 + (B*t)) - c0.
NLR c
  /OUTFILE='C:\SPSSFNLR.TMP'
  /PRED PRED_
  /CRITERIA SSCONVERGENCE 1E-8 PCON 1E-8 .

* Cx * ( 1 - ( ( XX / ( XX + x ) ) ** 2 ) ).
* NonLinear Regression.
MODEL PROGRAM c0=3.46 Cx=9.1 XX=46.9 .
COMPUTE PRED_ = Cx * ( 1 - ( ( XX / ( XX + x ) ) ** 2 ) ) - c0.
NLR c
  /OUTFILE='C:\SPSSFNLR.TMP'
  /PRED PRED_
  /CRITERIA SSCONVERGENCE 1E-8 PCON 1E-8 .

* pa * (1-EXP(-pb * x)) + pc * (1-EXP(-pd * t)).
* NonLinear Regression.
MODEL PROGRAM c0=8.1 PA=7.55 PB=0.06 PC=16.8 PD=0.6 .
COMPUTE PRED_ = pa * (1-EXP(-pb * x)) + pc * (1-EXP(-pd * t)) - c0.
NLR c
  /OUTFILE='C:\SPSSFNLR.TMP'
  /PRED PRED_
  /CRITERIA SSCONVERGENCE 1E-8 PCON 1E-8 .

* PCX * ( 1 - ( ( PX / ( PX + x ) ) **2 ) ) * ( 1 + PM * ( 1- (( PT / (PT + t ) ) **0.3 ) )).
* NonLinear Regression.
MODEL PROGRAM c0=32.5 PCX=14.5 PX=7.3 PT=1.51 PM=7.1 .
COMPUTE PRED_ = PCX * ( 1 - ( ( PX / ( PX + x ) ) **2 ) ) * ( 1 + PM * ( 1- (( PT / (PT + t ) ) **0.3 ) )) - c0.
NLR c
  /OUTFILE='C:\SPSSFNLR.TMP'
  /PRED PRED_
  /CRITERIA SSCONVERGENCE 1E-8 PCON 1E-8 .