topic Re: Boosting Sampling - Please Help Thank you in Statistical Procedures

Boosting Sampling - Please Help Thank you

Kanyange — Mon, 01 Dec 2014 14:54:10 GMT

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;

Re: Boosting Sampling - Please Help Thank you

stat_sas — Mon, 01 Dec 2014 15:36:22 GMT

Hi,

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

Re: Boosting Sampling - Please Help Thank you

Kanyange — Mon, 01 Dec 2014 16:57:15 GMT

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

Thank You..

Re: Boosting Sampling - Please Help Thank you

stat_sas — Tue, 02 Dec 2014 01:30:08 GMT

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?