**trick to get predicted values on a new data set that is not included in the fit**;

**use case weights of zero for the new data set**;

data databoth; set data0(in=in0) data1(in=in1);

if in0 then wt=1;

else if in1 then wt=0;

proc logistic des data=databoth;

model y=x;

weight wt;

output out=pred1 xbeta=p;

**model 1**;

data data1;set pred1;

if wt=0; **subset to new data**;

proc logistic des data=data1;

model y= /offset=p;

**model 2**;

proc logistic des data=data1;

model y=p;

**model 3**;

data data1;set data1;

group=p;

proc rank data=data1 out=data2 groups=10;

Var group;

proc logistic des data=data1;

Class group;

Model y=group p /noint;

**alternative: newer syntax to get predictions on a new data set**;

proc logistic des data=data0 outmodel=model0;

model y=x;

proc logistic inmodel=model0;

score data=data1 out=pred1;

**convert predicted probability to linear predictor**;

data pred1;set pred1;

p=log(p_1/(1-p_1));