. I was running SAS and I tried to calculate odd ratios of some variables of my dataset using proc logistic but I received a message that the model could not be fitted. After going into the SAS manuals and I was guided by SAS to set a new singular value to fit the model to my dataset. I checked the SAS manual and understood that the default singular value is 10 -9 , then I changed the singular value for that value to 1 stepwise, I did this lots of times and in each time I used 10 times greater value (i.e. 10 -9 . 10 -7 , etc…). Finally SAS said that the model was converged but it dint give me any value in the tables, It only showed “.” Rather than values. How do I fix this please? Can I use Proc genmod rather than proc logistic to sort out the data with the odd ratios? Or it is better to use logistic?. many thanks
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