[R] problems when merging two data sets

[Bert Gunter]

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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 Tue, Feb 5, 2019 at 10:04 AM sasa kosanic <sasa.kosanic using gmail.com> wrote:

> Dear All,
>
> I would like to merge two data sets however I am doing something wrong...
> 1 data set contains 2 columns of  'species occurrence'(1 column) in Germany
> and  'species names' (2 column).
> and the second one names of 'Red list species'(1 column) and 'species
> status' (2 column).
> so I would like to merge Red list species with species names from the first
> table and to sign the  species status
> I have tried with merge function but got this an error:" 'by' must specify
> a uniquely valid column"
> I also tried with the function left_join, however no success.
>
> Also columns in two data sets are different in size. 1 table has 7189 rows
> and 2 table just 426 rows as we do not have much Red list Species.
>
> I would appreciate your help.
>
> Kind regards,
> Sasha
>
>
> Dr Sasha Kosanic
> Ecology Lab (Biology Department)
> Room M842
> University of Konstanz
> Universitätsstraße 10
> D-78464 Konstanz
> Phone: +49 7531 883321 & +49 (0)175 9172503
>
> http://cms.uni-konstanz.de/vkleunen/
> https://tinyurl.com/y8u5wyoj
> https://tinyurl.com/cgec6tu
>
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