EffectPlot Error message

[GKati]

Hello, 

I'm still struggling with the EffectPlot procedure. I would like to graph the probability of getting treated (y-axis) per year (x-axis) with 95% confidence interval. 

ODS GRAPHICS ON;

proc logistic data=data descending;

class year;

model treated=year;

effectplot slicefit(x=year)/noobs;

run;

ODS GRAPHICS Off;

I get the following error message:

ERROR: The X= variable must be a continuous variable used in the model.

Thanks

[Damo · Accepted solution]

Hi @GKati

I would say in your case YEAR is a DISCRETE variable.

And as pointed by the documentation, X MUST be a continous variable.:

Hope that helps.

Cheers,
Damo