[R] Minor warning about seq

[Prof. John C Nash]

I spent more time than I should have debugging a script because I wanted
   x<-seq(0,100)*0.1

but typed
   x<-seq(O:100)*0.1

seq(0:100) yields 1 to 101,
Clearly my own brain to fingers fumble, but possibly one others may want to avoid it.

JN