[R] Merging multiple .csv files into one dataframe

[Bert Gunter]

I really think you need to create a simple reprex to show us what you want
to do. In doing so, you may figure out how to get what you want. I suspect
you may also need to spend some more time learning R -- following rote
examples can be a fool's errand if you don't know the basics.

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, Jun 9, 2021 at 3:41 PM Esthi Erickson <ericksonesthi using gmail.com>
wrote:

> Hi,
>
> I am trying to merge columns from four different .csv files into one
> dataframe. I am trying to do something like this
> https://statisticsglobe.com/merge-csv-files-in-r . I am taking long format
> .csv files, 1 being the base file (testing-long.csv) which I change to wide
> format first and the three others being supplemental files that should add
> columns plight, plightLitter, Root Biomass, NO3Soil, NH4Soil and then add
> data to cells where the it matches any one of the values for columns,
> "Exp", "Year", "Field", "Plot", "NTrt", "NAdd", "NitrAdd", "NAtm.NAdd". So
> the values for the supplemental files need not match every single one of
> the columns listed above and if the value does not match all the columns
> exactly the cell for that column/row should not be filled. When I try the
> method from that website, I do not see the supplemental columns being
> added. I am wondering if there is a better way to merge multiple .csv
> files. I hope this makes sense, but it is quite confusing even to me, so I
> am more than happy to clarify. I am attaching the files in question.
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