# [R] Double AND within an IF statement

Duncan Murdoch murdoch.duncan at gmail.com
Wed Feb 24 17:31:33 CET 2016

```On 24/02/2016 11:27 AM, Bert Gunter wrote:
> I would have assumed that age, etc. were vectors; but that's why I
> said "almost" surely.

Okay, so you were confusing if () with ifelse().

Duncan Murdoch

>
> -- Bert
>
>
> Bert Gunter
>
> "The trouble with having an open mind is that people keep coming along
> and sticking things into it."
> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
>
>
> On Wed, Feb 24, 2016 at 8:24 AM, Duncan Murdoch
> <murdoch.duncan at gmail.com> wrote:
> > On 24/02/2016 11:18 AM, Bert Gunter wrote:
> >>
> >> Almost surely no.
> >>
> >> You are confusing "&&" with "&"
> >>
> >> ?"&"
> >
> >
> > I think Bob had it right...
> >
> > Duncan Murdoch
> >
> >> -- Bert
> >>
> >>
> >> Bert Gunter
> >>
> >> "The trouble with having an open mind is that people keep coming along
> >> and sticking things into it."
> >> -- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )
> >>
> >>
> >> On Wed, Feb 24, 2016 at 8:10 AM, Robert Sherry <rsherry8 at comcast.net>
> >> wrote:
> >> > This should work:
> >> >     if ( age > 4 && age < 8 && infection > 0 ) replacement = 2
> >> >
> >> > Bob
> >> >
> >> > On 2/24/2016 7:08 AM, Polychronis KOSTOULAS wrote:
> >> >>
> >> >>
> >> >> Hi there,
> >> >>
> >> >> apologies if this is easy. I want to write this condition:
> >> >>
> >> >> If age is more than 4 years and less or equal to 8 years and infection
> >> >> is
> >> >> positive then replacement is 2.
> >> >>
> >> >> Can you help me the double END?
> >> >>
> >> >> Thanks,
> >> >> Polychronis
> >> >>
> >> >> ______________________________________________
> >> >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> >> https://stat.ethz.ch/mailman/listinfo/r-help
> >> >> http://www.R-project.org/posting-guide.html
> >> >> and provide commented, minimal, self-contained, reproducible code.
> >> >>
> >> >
> >> > ______________________________________________
> >> > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> > https://stat.ethz.ch/mailman/listinfo/r-help
> >> > http://www.R-project.org/posting-guide.html
> >> > and provide commented, minimal, self-contained, reproducible code.
> >>
> >> ______________________________________________
> >> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
> >> https://stat.ethz.ch/mailman/listinfo/r-help