Displaying 3 results from an estimated 3 matches for "diat".
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2013 Apr 05
2
transforming data prior to CCA
Hi everyone,
I?m a student and relatively new to R so apologies in advance if this
question seems stupid or obvious to you.
I have collected a dataset with about 60 species of diatoms (count data from
19 different sample sites) and environmental variables for each site
(salinity, pH, etc.). It?s all in the same dataset but distinct in R through
the functions below
diat <- diatom [, 1:60] ##species
envir<- diatom [, 61:66] ##environmental variables
The long-term plan...
2011 Nov 07
2
ordination in vegan: what does downweight() do?
Can anyone point me in the right direction of figuring out what downweight()
is doing?
I am using vegan to perform CCA on diatom assemblage data. I have a lot of
rare species, so I want to reduce the influence of rare species in my CCA. I
have read that some authors reduce rare species by only including species
with an abundance of at least 1% in at least one sample (other authors use
5% as a rule, but this removes at leas...
2019 Oct 25
2
Duda de como contar casos por Programa.
Hola,
Tengo un tabla de datos con pacientes asistidos, para los cuáles tengo
variables como dni, género, programa de atención etc. Hay pacientes que
atendieron en más de un programa por lo cuál se repiten en la tabla. Lo que
quiero es poder contar con una matriz que me permita identificar la
cantidad de pacientes que coinciden entre programas.
Va un ejemplo:
[image: image.png]
Intenté de