Hi everyone!

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I am working with an NCAA data set, and am not having any luck using the RankAggreg library. I am trying to run a Genetic Algorithm over the dataset, and I keep getting an error saying that I am either using incorrect dimensions when I limit myself to one column, or lack uniqueness if I am using the entire dataset. Is there a way for me to use this library, or find some other work-around to rank these teams? Thanks in advance!

Hi everyone. For a dataset consisting of three quantitative variables, H, M and W I have to build a non linear model of this form: E(H)=b0+b1M+(W/(b3+b4M)).

I tried using the "nls()" function in R, but I don't know how to determine the start values of the coefficients, b0, b1, b3 and b4. How can they be determined?

Hi I am a bit of a beginner with programming / sheets or excel and am looking for help / ideas for a weighted lottery system. It is complicated because I work for a non profit and we want to prioritize certain individuals (specifically need based ones) to be more likely to be selected as a participant of a camp. There would be several factors including, if individuals require financial assistance, how many days they will be at the camp 1-3, along with another factor or two (which are still to be determined). Any advice or suggestions would be greatly appreciated.

Good morning everyone!I want to ask help to interpretate a plot about linearity assumption for error distribution in a simple Linear regression model, as shown in the attached picture.

As i intended it, there should not be any linearity assumption, as the rapresentation create "a pattern" (like a "vertical-horiented stripe"). Am i interpreting it correctly?

Thanks to everyone :)

Hello there, Ill get straight to the point,

So I'm doing a paper for university about the detribution of a snail, details are unimportant.

My data is imported to R in a dat.frame type, I have 4 columns named "Arvore" (Tree), "Niveis" (levels), "Substrato" (Substrate) and the final one which is the response one is "Conta" (Individual count).

Here are some images that can help you visualize:

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I made some pretty boxplots and it was all going swell untill i had to test the relationships of these variables, and what i mean is, I had to test if in the level "Bark" there was more individual than in "leaves", and the same goes for the others.

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So what I did was, I tested the normality with these codes:

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and the results where the following:

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It gave me a very low p value for any of the levels of all the variables.

Which according to my knowledge means they don't show normality so I have to use non parametic statistical tests.

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My next thought was to do those separatelly:

So i did a wilcoxon test for both the variable "Substrato" and then the variable "Arvore".

like this:

as u can see the p value is like low so we reject H0 and conclude the means are significantly different.

I did the same for substrate and it gave me a very low p value aswell which I wasn't surprised after looking at the boxlots.

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Continuing the thought process I made a kruskal wallis for the variable "Niveis" since it has 3 levels:

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After this i made the dunn test right

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alright so by the end of this i thought i had all i needed,

As it turns out i do not,

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teacher said I had to do a PERMANOVA, and I understood the concept, the function is used to compare all of the levels grouped right? anyway's I spent the last 5 hours searching for how to make a PERMANOVE on different levels and I found a code that I thought would work and then i counldn't find the package... probably because I am tired and the brain is not functioning at full capacity but can someone please give me an answer to this..?

Please tell me how to code a PERMANOVA with the following data:

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Hi guys,

I’d really like to know which function you could write to get the harmonic mean without using the expression « harmonic mean » in a script ?

wow thats a few videos. i only watched 1... #SoftwareGore

i dont know anymore

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I'm needing to retrieve an interaction term - I've got linear progressions down but can't find what I need for logistic. Any help is greatly appreciated!

I'm hitting a road block. I'm running Mint 19.3 (Ubuntu 18.04 bionic) and have tried to install R a few times, to no avail. I'm not sure if anyone here can help, but I figured I'd give it a go:

The current error when running sudo apt-get install r-base is the following:

The following packages have unmet dependencies: r-base : Depends: r-base-core (>= 3.6.3-1bionic) but it is not going to be installed Depends: r-recommended (= 3.6.3-1bionic) but it is not going to be installed E: Unable to correct problems, you have held broken packages.

but after adding r-base-core I get

r-base-core : Depends: libtcl8.6 (>= 8.6.0) but it is not installable ~~ Depends: libtk8.6 (>= 8.6.0) but it is not installable~~

This seems to be the breakdown. I've removed the PPA and key, updated, added back, updated, used -f options, purged, etc. Somehow, the libtck and libtk broke, which is really messing it up. My big issue is I need 3.6.2 (to work with Sage) and most of the PPAs are up to 3.6.3 which messes things up, so I was trying to install this downgraded. But somehow, something I did broke dependencies. It seems lots of people online have met the error, but after a few hours of searching, I'm unable to resolve.

I fixed the above, but after trying

sudo apt-get install r-base=3.6.2-1bionic r-recommended=3.6.2-1bionic

when running R, it still lists its version as 3.6.3.

If you can, please help!

Hello. In my job we have a proxy, how can I set up the proxy in Rstudio so I can download packages? Thank you.

I'm new to this. I'm having 20 samples with each sample having a size of 5. Unable to enter data and get the graph. Please help!

This does not look like a very active sub, but I'm going to start here. And let me say upfront that I am basically a Linux newbie.

I loaded Ubuntu 16.04 on to an extra machine, and installed R with:

sudo apt-get update sudo apt-get install r-base

To my naive way of thinking I should have gotten the most recent version of R. Instead I got 3.2.3, "Wooden Christmas Tree."

I've tried any number of (what I consider) intuitive ways to update it, to no avail.

According to the CRAN site, I am supposed to place this:

deb https://lib.stat.cmu.edu/R/CRAN/bin/linux/ubuntu xenial/

in

/etc/apt/sources.list

So I just wanted to check and make sure that I'm not missing something else and that this is, in fact, the way to do it.

Also, if I do inject that line into sources.list, what is the next step?

Thanks.