topic Re: Proc Orthoreg Confidence/Prediction intervals in Statistical Procedures

Proc Orthoreg Confidence/Prediction intervals

JR4012 — Tue, 19 Feb 2019 10:41:56 GMT

When using proc orthoreg to build polynomials, I can create the models etc fine and the charts plot 95% Confidence and prediction intervals. I'm looking for a way to have details printed and the parameters used to construct them but can't find the correct syntax.

Re: Proc Orthoreg Confidence/Prediction intervals

Rick_SAS — Mon, 25 Feb 2019 14:35:46 GMT

Please post the PROC ORTHOREG code, the output, and explain what you wish to see.

Re: Proc Orthoreg Confidence/Prediction intervals

Cingchih — Sat, 11 Sep 2021 02:36:39 GMT

I have the same problem as him. Take the following as an example.

data polynomial;
do i=1 to 101;
x=(i-1)/(101-1);
y=10**(9/2);
do j=0 to 8;
y=y*(x-j/8);
end;
output;
end;
run;
ods graphics on;
proc orthoreg data=polynomial;
effect xMod = polynomial(x / degree=6);
model y = xMod;
effectplot fit / obs;
store OStore;
run;
ods graphics off;

SAS produced the 95CI interval. I want to know the upper and lower limits value of each data point. What syntax should I use?

I checked the SAS manual, and the Proc orthoreg statement only has the outset option, which does not seem to output the upper and lower limits value of each data point.

https://support.sas.com/documentation/onlinedoc/stat/141/orthoreg.pdf

see p6699

Please reply, thank you.

Re: Proc Orthoreg Confidence/Prediction intervals

PGStats — Sat, 11 Sep 2021 04:41:19 GMT

try adding the statement

ods output FitPlot=Fitplot;

to the procedure. It will create a dataset called FitPlot with each point and interval values.

Re: Proc Orthoreg Confidence/Prediction intervals

Cingchih — Sat, 11 Sep 2021 16:14:01 GMT

Really solved it, thank you for your valuable grammar.