[R] Joining data frames

[Jim Lemon]

Hi Esthi,
Have you tried something like:

df2<-merge(df,df1,by.x="Sample",by.y="Plot",all.y=TRUE)

This will get you a right join in "df2", not overwriting "df".

Jim

On Wed, Jun 30, 2021 at 1:13 AM Esthi Erickson <ericksonesthi using gmail.com> wrote:
>
> Hi and thank you in advance,
>
> If I have a dataframe, df:
>
> Sample
>
> Plot
>
> Biomass
>
> 1
>
> 1
>
> 1024
>
> 1
>
> 2
>
> 32
>
> 2
>
> 3
>
> 223
>
> 2
>
> 4
>
> 456
>
> 3
>
> 1
>
>
> 3
>
> 2
>
> 331
>
> 3
>
> 3
>
> 22151
>
> 3
>
> 4
>
> 1441
>
> And another one, df1:
>
> Sample
>
> Plot
>
> % cover of plant1
>
> % cover of plant2
>
> 3
>
> 1
>
> 32
>
> 63
>
> 3
>
> 2
>
> 3
>
>
> 3
>
> 3
>
>
> 3
>
> 3
>
> 4
>
> 5
>
> 23
>
> I want to join these tables where the columns Sample and Plot are the same.
>
> Currently trying:
>
> df<- right_join(df, df1, by = c(“Sample”, "Plot"))
>
> I am working with a much larger dataset, but it will cut off the data
> starting at Sample 3 instead of joining the tables while retaining the
> information from df. Any ideas how I could join them this way?
>
>
> Esthi
>
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>
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