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QUESTION
From this book here
...ANSWER
Answered 2021-Mar-17 at 15:46Although RStudio told me, all packages were up to date, the problem continued to exist. The solution was a full update of R and all packages. The process on Windows:
- Run
installr::update()
from Rgui.exe (in \R\R-4.0.4\bin\x64). - Update Windows environment variable
R_LIBS
the the new \R\R-4.0.4\library. - update Rprofile.site in \R\R-4.0.4\etc and make sure there is only one
.libPaths()
. (There has to be a line.libPaths("C:/R/R-4.0.4/library")
or just add it.) - Check if there are pending package updates in RStudio
QUESTION
I want to plot a map of the following data, dt_plot
, which has 2 unique counties in it.
ANSWER
Answered 2019-Apr-18 at 23:18cnty <- map_data("county") # Load the county data from the maps package
cnty2<- cnty %>%
mutate(polyname = paste(region, subregion,sep=",")) %>%
left_join(county.fips, by="polyname")
QUESTION
As I found later somewhere else, the Chi² test is probably not appropriate for my data here or rather does not test what I want to find out. Therefore, I conducted a generalised linear model (glm) with a Poisson distribution on my data which worked out quite nicely. So bear this in mind...
.
After consulting various websites on this problem (like this, this or this) and of course the official documentation of the chisq.test
function, I still cannot figure out a solution to my problem.
I want to conduct a Chi² Test of Independence on my data via the chisq.test
function in R
. My data is composed of 4 epiphyte species found on 4 host tree species (that means: plants of 4 species growing ON these 4 tree species). Now, I want to find out if the epiphytes are equally distributed among those trees or if maybe one tree species tends to host more epiphyte individuals as the others. The standard Chi² test I can conduct quite easily (see below). But this would then as well test if epiphyte species were equally distributed, which I don't want to be tested. So, how can I submit different probabilities for my contingency table in the cisq.test
function? Namely, I want the expected matrix to be according to the number of epiphyte individuals per species while expecting them to be equally distributed among the tree species. This sounds complicated, so just have a look at my example data:
(I edited the data format as suggested by @paoloeusebi)
Observed data: ...ANSWER
Answered 2018-Dec-05 at 11:06It is better to input data as matrix instead as data frame.
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