topic Re: Is It possible to delete outlier observation under rstudent condition in reg procedure ? in SAS Procedures

Is It possible to delete outlier observation under rstudent condition in reg procedure ?

LeeSeongWoo_ — Thu, 21 Jun 2018 13:49:19 GMT

Hello . Thank you for your time.

I have some terrible question.

I have to clear the observation that out of (-2,2) rstudent .

Does anybody know how to delete those observation out of (-2,2) ,by coding ? there are too many to find and delete manually...

ballardw — Thu, 21 Jun 2018 14:15:18 GMT

From you graph it appears that you may have a variable rstudent with values of concern. If that is the case then what you want is fairly simple:

Data want;

set have;

where -2 le rstudent le 2;

run;

LeeSeongWoo_ — Thu, 21 Jun 2018 14:20:02 GMT

Thank you for your reply . but This graph is part of the proc reg result .

for example :

proc reg data = work.aa;

model y=x1 x2 x3;

run;

so i don't have rstudent variable .

what i want to know is how can i make these variable ?

Thank you for reading

Ksharp — Thu, 21 Jun 2018 14:25:44 GMT

Use OUTPUT statement to save rstudent:

proc reg data=sashelp.class;
model weight=age height;
output out=want rstudent=rstudent cookd=cookd;
quit;

and proc sort it ,delete obs you don't want.

ballardw — Thu, 21 Jun 2018 15:51:01 GMT

You can use dataset options on output data sets in procedures that create data sets directly:

proc reg data=sashelp.class;
model weight=age height;
output out=want (where=( 2 le rstudent le 2))
      rstudent=rstudent cookd=cookd;
quit;