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Questions tagged [kruskal-wallis]

The Kruskal–Wallis one-way analysis of variance by ranks is a non-parametric method for testing whether samples originate from the same distribution. It is used for comparing more than two samples that are independent, or not related.

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ggpubr: change font size of stat_compare_means Kruskal-Wallis p-values

How can I change the font size of stat_compare_means on the plot below? I.e, change the "Kruskal-Wallis, p = 1.5e-09" and the other p-values font size? I would like to use a smaller font size than the default one... Following the data…
guidebortoli
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how to create a table as dunn.test output (R)?

I'm working with bacteria pyrosequencing data and I'm doing the statistical analysis with R. I have 21 samples and 7 different treatments. I loaded my data into R phyloseq obtaining: > psR phyloseq-class experiment-level object otu_table() OTU…
Lidia_N
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Kruskal - Wallis p-value matrix for data subsets with R

Consider a dataset Data which has several factor and several numerical continuous variables. Some of these variables, let's say slice_by_1 (with classes "Male", "Female") and slice_by_2 (with classes "Sad", "Neutral", "Happy"), are used to 'slice'…
GegznaV
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Input format for Kruskal-Wallis test in Python

I am comparing regions in the DNA on structural breaks in cancer patients and healthy people. I am trying to run a Kruskal-Wallis test (SciPy Stats) on the number of breaks for each region, to see if there is a difference between the two…
Annevv
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Extract p-value from Kruskal-Wallis output

Let's say I have a dataframe > col1<-c(1,5,2,6,8,1,3,8,9,1,8) > col2<-c(1,2,1,1,2,2,1,2,2,1,1) > df<-data.frame(col1,col2) > df col1 col2 1 1 1 2 5 2 3 2 1 4 6 1 5 8 2 6 1 2 7 3 1 8 8 2 9 …
Olli J
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Multivariate Kruskall Wallis Package in Python

I would like to investigate whether there are siginifcant differences between three different groups. There are about 20 numerical attributes for these groups. For each attribute there are about a thousand observations. My first thought was to…
Pytno
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R - stat_compare_means return differnt value from Kruskal-Wallis test

I want to plot the p value of Kruskal-Wallis test to my ggplot using the R function stat_compare_means from the package ggpubr. However, the plotted value is different from the value if I simply run the function: kruskal.test(value ~ type, data =…
DigiPath
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How to get effect size for Kruskal Wallis test in Python?

I am trying to do Kruskal Wallis test in python that not only gives me the H statistics and the p value, but also the effect size. I have tried scipy's stats.kruskal() function, but only the H and p were returned. with a pandas dataframe, so I…
VeritatemAmo
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Find and visualize best and worst items using boxplot

I am a dataset of jokes Dataset 2 (jester_dataset_2.zip) from the Jester project and I would like to divide the jokes into groups of jokes with similar rating and visualize the results appropriately. The data look like this >…
Slazer
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r - In is.not.number.warning(x)

I have a problem to perform a kruskal wallis test with package data.table and module Terr on RStudio. Variables : $WL_TEST_Q1: num[1:41725] $SPLIT: chr[1:41725] $TEST_NUM_NAME: chr[1:41725] Code : setDT(DT) KwTestQ1 <- DT[!is.na(WL_TEST_Q1),…
Laurent Cesaro
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Add kruskall-wallis and paiwise comparisons test outputs to dataframe

I have several boxplots that I am running some statistics on through a for loop. I want to be able to output the data into a dataframe. i.e. something like this (I've made up random numbers): For the Kruskal-Wallis: For the pairwise…
Melanie Baker
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Error adding the Kruskal Wallis pvalue into boxplots with facet_grid in R

I am trying to add the Kruskal Wallis pvalue to my boxplots and although I have seen a lot of posts with the solution, I cannot make it work. This is my data and the code to run the boxplots: library(ggplot2) library(dplyr) set.seed(1234) Gene <-…
emr2
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R ggplot2: add kruskal Wallis and pairwise Wilcoxon test to boxplots with multiple groups/subgroups within each group and facet

I am trying to add kruskal Wallis and pairwise Wilcoxon test to the figure to show which groups are significant different, but I have multiple groups/subgroups within each group and facet which makes it complicated. Here is the R code by using iris…
dolphin
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Guidelines for specifying variables in a function

Consider dat1 created here: set.seed(123) dat1 <- data.frame(Region = rep(c("r1","r2"), each = 100), State = rep(c("NY","MA","FL","GA"), each = 10), Loc = rep(c("a","b","c","d","e","f","g","h"),each = 5), …
Ryan
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Get Kruskal-Wallis Ranks from function

I'm using Kruskal-Wallis to do some analysis on non-normal/heterskedastic data and I'm keen to use Welch's t-test implementation data as described by Cribbie et al here. Their process involves performing the Welch's T-test on the ranks from K-W. …
Alicia
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