Boosting Sampling - Please Help Thank you

[Kanyange]

Hi All,

I have never used boosting sampling, please see the code below! Could anyone explain what this code does and what's the objective of the boosting technique?

I started with train_pot that has a target1=4 and target0=34 and I end up with a  train_final that has  target1=34 and target0=34 (50:50).

Your help would be much appreciated.

Many Thanks

/* Boost the training file to have a 50:50 target1 vs target0 */    

proc surveyselect data=train_pot

     out=train_pot

     method=urs

     sampsize=&max_cust.

     seed=0;

strata target;   

run;    

proc freq data=train_pot.;    

table target*numberhits /out=check_boost;   

run;    

data train_final;    

set train_pot.;   

do i = 1 to numberhits;   

  output;  

end;   

run;   

[stat_sas]

Hi,

What is the desired output you are looking for as a result of boosting sampling?

[Kanyange]

I would like to Boost the training file to have a 50:50 target1 vs target0.....

Thank You..

[stat_sas]

Sorry for late reply,objective is to over sample a rear event in the model development data but using method above you may have multiple same observations in train_final data for target=1 right?