[R] Minor warning about seq

Dieter Menne dieter.menne at menne-biomed.de
Wed Dec 1 09:14:17 CET 2010

Prof. John C Nash wrote:
> 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,

Which leads us to another rule: never use a variable called "O". I remember
this was a no-no even in my first Algol-course in 1967.

In a virginal Rgui:

> x<-seq(O:100)*0.1 
Error in seq(O:100) : object 'O' not found

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