search for: diatom

Hi, I'm trying to make a boxplot with the data at the end of the message, and when I try to execute the command >boxplot(Diatoms) (or for any other field instead of "Diatoms") I get the following error message: Error in oldClass(stats) <- cl : adding class "factor" to an invalid object Any advice would be much appreciated. Thanks a lot, Miriam Date Depth Diatoms Bacteria V1...

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 least...

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 is...

...ng R, I was doing a one-way analysis for the two data-sets given below in the R-class. I got a typical error in "emmeans" package, please help: Data-set-1: -------------- Medley and Clements (1998) investigated the impact of zinc contamination (and other heavy metals) on the diversity of diatom species in the USA Rocky Mountains. The diversity of diatoms (number of species) and degree of zinc contamination (categorized as either of high, medium, low or natural background level) were recorded from between four and six sampling stations within each of six streams known to be polluted, as gi...

...alysis for the two data-sets given below in the > R-class. I got a typical error in "emmeans" package, please help: > > Data-set-1: > -------------- > Medley and Clements (1998) investigated the impact of zinc contamination > (and other heavy metals) on the diversity of diatom species in the USA > Rocky Mountains. The diversity of diatoms (number of species) and degree of > zinc contamination (categorized as either of high, medium, low or natural > background level) were recorded from between four and six sampling stations > within each of six streams known t...

...ng R, I was doing a one-way analysis for the two data-sets given below in the R-class. I got a typical error in "emmeans" package, please help: Data-set-1: -------------- Medley and Clements (1998) investigated the impact of zinc contamination (and other heavy metals) on the diversity of diatom species in the USA Rocky Mountains. The diversity of diatoms (number of species) and degree of zinc contamination (categorized as either of high, medium, low or natural background level) were recorded from between four and six sampling stations within each of six streams known to be polluted, as gi...

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Hi, I need to build ROC curve in R, can you please provide data steps / code or guide me through it. Thanks and Regards Rithesh M Mohan [[alternative HTML version deleted]]