[R-sig-eco] return min and max with conditions

[Bede-Fazekas Ákos]

Dear Thiago,
a reproducible example and a desired output would help us to understand 
and solve the problem. The description was not clear, at least, for me.
But it seems to be a simple apply/lapply/aggregate/by task that can be 
solved without installing packages.
Best wishes,
Ákos Bede-Fazekas
Centre for Ecological Research, Hungary


2022.02.16. 16:38 keltezéssel, Thiago A. Pires írta:
> I'm trying to automate a process in R, but I still can't get to what I
> need. I have two data-frames indexed from the same code in the lines, which
> would be the samples, one data-frame identifies the species that occur in
> the samples and the other identifies the environmental variables of these
> samples. I need the minimum and maximum of environmental variables to be
> returned according to two conditions, the maximum or minimum returned has
> to search for samples and group by species. All available packages and
> scripts that I've checked don't do what I need, does anyone have any ideas?
>
> Thanks.
>
> Thiago
>
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