data d;
input Day Temp RH;
label Day = "Reaction Day (Hours)"
Temp = "Temperature (Degrees Centigrade)"
RH = "Percent of humidity";
datalines;
15 24 78
12 24 79
15 24 78
11 24 79
13 22 75
14 22 75
14 22 75
13 22 75
9 30 74
10 30 74
10 30 74
10 30 74
11 26 62
10 25 62
10 26 62
11 26 62
;
ods graphics on;
proc rsreg data=d plots=(ridge surface);
model Day=RH Temp / lackfit;
ridge max;
run;
Greeting All
I used the SAS code got blank for Lack of Fit, Is there something wrong with the data? If I got a lack of fit significant what is the other method to get a better model.
Thanks in advance
I think it's blank because the degrees of freedom attributable to lack-of-fit is zero.
According to the wikipedia article Lack-of-fit sum of squares the degrees of freedom for lack of fit is n-p, where
Available on demand!
Missed SAS Innovate Las Vegas? Watch all the action for free! View the keynotes, general sessions and 22 breakouts on demand.
Learn how use the CAT functions in SAS to join values from multiple variables into a single value.
Find more tutorials on the SAS Users YouTube channel.
Select SAS Training centers are offering in-person courses. View upcoming courses for: