Plot a variable not specified in Model for reg proc

[alex_PARIS]

Hi everybody,

Newby on the forum and with sas, I would like to do a regression for exemple :
model car_solded = earn population

After I would like plot the results and residues on the same graph but depending on time. But I have the problem below:
ERROR: A variable was specified in the PLOT statement which is not specified in a VAR or
MODEL statement

The complete example is below:
proc reg data=data.data_used;
title 'regression lineaire';
model car_solded = earn population /r p;
plot r.*Time;
run;


Could someone helping me.
Thanks a lot

[Robert_Bardos]

The documentation for PROC REG says

VAR
lists variables for which crossproducts are to be computed, variables that can be interactively added to the model, or variables to be used in scatter plots.


So you probably need a VAR statement here (as the ERROR message suggests BTW.)

As an aside: why can't these error messages say which variable? Should be pretty much known ...