This is well described in the manual.
Sounds like homework...
el
On 15/10/2020 12:39, Nico Gutierrez wrote:> Hi All,
>
> Trying to get familiar with dplyr so I have a basic question:
>
> How to summarise sum(Values) per species, maintaining Code column (each
species has a Code):
>
> Species Values Code
> 1 Acanthocybium solandri 33 LC
> 2 Makaira nigricans 20 VU
> 3 Makaira nigricans 20 VU
> 4. Makaira nigricans 20 VU
> 5 Sarda sarda 2 LC
> 4 Lethrinus lentjan 12 LC
> 5 Raja pita 8 DD
> 6 Raja pita 2 DD
>
> I need:
>
> Species Values Code
> 1 Acanthocybium solandri 33 LC
> 2 Makaira nigricans 60 VU
> 3 Sarda sarda 2 LC
> 4 Lethrinus lentjan 12 LC
> 5 Raja pita 10 DD
>
>
> Thanks :)
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Dr. Eberhard W. Lisse \ / Obstetrician & Gynaecologist
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