[R] Problem with large/small numbers in knitr

I have problems with very large numbers using knitr. In the following, my a and b are extremely small and ssrr and ssru are extremely large. Knitr delivers error messages. Scaling ssrr and ssru by 1000 resolved the problem: ssrr <-ssrr/1000 ; ssru<-ssru/1000 Any clue as to how I might resolve the

[R] Demographic Variables in AIDS (Demand System)

Hi all, I am using aidsEst( ) in "micEconAids" package to estimate Demand system. But I would like to add more demographic variables in demand system. How can I add those information? for example: mydata<-data.frame(p1,p2,p3,p4, s1,s2,s3,s4,