When I use solution option in the GLM procedure.
I always got the following message:
NOTE: The X'X matrix has been found to be singular, and a generalized
inverse was used to solve the normal equations. Terms whose estimates
are followed by the letter 'B' are not uniquely estimable.
The model I use is simple while x is 0 or 1.
proc glm data=data_one;
class x;
model y=x/solution;
run;
quit;
It seems that SAS just routinely gives the error where there was no
confounding problem. Whil
