[R] Logic operators...more than one??

[Bert Gunter]

Inline.
-- 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, Oct 3, 2018 at 4:02 PM David Doyle <kydaviddoyle using gmail.com> wrote:

> I'm sure this is a simple question but I'm not sure where to find the
> answer.
>

Good R tutorials abound on the internet. One resource is:
https://www.rstudio.com/online-learning/#r-programming

but there are tons more if you search.

>
> I want to remove some of the data.  For example when my Location column is
> MW-09, MW-10, or MW-11.
>
> It works fine if I ONLY list ONE of the locations as in:
>
> SampledWells <- MyData[ MyData$Location != "MW-09", ]
>
> But if I try to do more than one (as shown below), I don't get an error but
> I also don't get my SampledWells
> SampledWells <- MyData[ MyData$Location != "MW-09", "MW-10", ]
>
> Thoughts??
>

?"%in%"

as in:

SampledWells <- MyData[ MyData$Location %in% c( "MW-09", "MW-10", "MW-11"),
]





> Thank you for your time
> David
>
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>
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