topic Re: How do I show a table of studentized residual and cooks distance values? in New SAS User

How do I show a table of studentized residual and cooks distance values?

DoctorShemp — Sun, 11 Nov 2018 21:07:52 GMT

Hi,

New SAS user here. In my linear regression class we are learning about outlier/high leverage point detection using studentized residuals and cook's distances. I know how to show these values on a plot:

proc reg data= data plots (only label) = RstudentByLeverage;

model y=x

run;

and

proc reg data= data plots (only label) = CooksD;

model y=x

run;

My question is simply how do I show these values in a table rather than on a graph/plot? I want to know the exact cook's distance and studentized residual of an observation but I can only approximate by looking at the plot.

Thank you!

Re: How do I show a table of studentized residual and cooks distance values?

PeterClemmensen — Sun, 11 Nov 2018 21:33:36 GMT

Welcome to the SAS community. As suggested by the PROC REG Documentation, you can specify r in the model statement options as in this small example

proc reg data=sashelp.class;
   model weight=height / r;
run;quit;

This gives you the table

Re: How do I show a table of studentized residual and cooks distance values?

DoctorShemp — Sun, 11 Nov 2018 22:01:45 GMT

Worked perfect, so simple.

Thank you!!!

Re: How do I show a table of studentized residual and cooks distance values?

PeterClemmensen — Wed, 14 Nov 2018 21:17:17 GMT

Anytime, glad to help 🙂

Re: How do I show a table of studentized residual and cooks distance values?

mintbit — Thu, 17 Sep 2020 17:31:12 GMT

How do I do the same procedure in logistic regression?

Re: How do I show a table of studentized residual and cooks distance values?

PaigeMiller — Thu, 17 Sep 2020 17:38:05 GMT

@mintbit wrote:

How do I do the same procedure in logistic regression?

What do you mean by "same procedure"? There are no studentized residuals or Cook's distance in logistic regression.

Re: How do I show a table of studentized residual and cooks distance values?

mintbit — Thu, 17 Sep 2020 17:57:01 GMT

Oh, They are listed in my power point from school, only it is written in spss? There you can choose all these options.

Wich statistic should I look at to isolate points that

1: for wich the model fits poorly

2:that exert an undue influence on the model.

I do not recognice the terms in sas compared to spss. In my power point it says to check that studenized, standardized and deviance should be 99%below 2.58 and 95% below 1.96.

The options I have found are plots for deviance and standardized deviance, is this sufficient?

Any

Re: How do I show a table of studentized residual and cooks distance values?

PaigeMiller — Thu, 17 Sep 2020 21:28:14 GMT

So, I don't know what you see in your Powerpoint from school.

There are different types of residuals available from PROC LOGISTIC, including some of the ones you mentioned. There is no such thing (as far as I know) as Cook's D for Logistic regression.

There are many goodness-of-fit statistics computed by PROC LOGISTIC, including Akaike's Information criterion (AIC), the Gini statistic and the C statistic. You can compute high leverage points by creating fake (continuous) Y values and then running the data through PROC REG.