Stack Overflow
Stack Overflow

Questions tagged [dunn.test]

dunn.test is a R package implementing Dunn's test of multiple comparisons using rank sums.

37 questions
6
votes
2 answers

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
  • 73
  • 1
  • 6
3
votes
0 answers

dunn's test plot - which package?

I came across a Dunn's test plot : Is there a package that can make these plots? I have run Dunn's test and want to present my data graphically.
user1607
  • 531
  • 7
  • 28
2
votes
3 answers

How to automate dunn_test and ggboxplot?

I'm working on a dataframe (called df) looking something like this (shortened here for practical…
sophiethomas
  • 63
  • 6
2
votes
0 answers

is there a way to place significance results in my ggplot?

I'm looking for a way to place my dunn's test results on my ggplot: either directly by somehow implementing the necessary code lines on the plot regarding the results of the dunn test or indirectly by placing just the letters regarding…
Roma JC
  • 57
  • 5
2
votes
1 answer

Looping Dunn's test with purr package

I would like to run a Dunn test with the purrr package. However, the tidy function to extract the parameter/results seemed to do not work with this test. Any one has sugesstion for me? My example. df <- data.frame(Type = c("n1", "n1", "n2", "n2",…
Anh
  • 735
  • 2
  • 11
2
votes
2 answers

dunn's test to loop over columns of a data-frame

I am trying to perform Dunn's test for Iris data. I want to loop over 4 columns and perform Dunn's test for each column on different species. However, when I try to get the column name it does not work. Can anybody tell me…
krishthw
  • 125
  • 8
2
votes
2 answers

Writing a function to summarize the results of dunn.test::dunn.test

In R, I perform dunn's test. The function I use has no option to group the input variables by their statistical significant differences. However, this is what I am genuinely interested in, so I tried to write my own function. Unfortunately, I am not…
yenats
  • 531
  • 1
  • 3
  • 16
2
votes
2 answers

control the output of dunn test

I'm using dunn.test() from the package dunn.test, and I don't want it to print anything to the std output (console) because I'm doing it many times, and I want to see if I have any warnings before that. So I canceled the printing of kruskal wallis…
T.G.
  • 743
  • 3
  • 6
  • 27
2
votes
2 answers

Write a data frame to a .xls file with a title

I adapted a script to run the multiple (post-hoc) comparisons dunn.test function from the dunn.test package, on multiple variables, which generates multiple data frames, saved with the bellow (simplified) code in an .xls file as separate tables.…
Yurié
  • 2,148
  • 3
  • 23
  • 40
1
vote
1 answer

Obtaining Significance letters (multcompView) while performing Dunn's Test

I am trying to obtain the significance letters with the function multcompLetters2( ) after performing a Pairwise Dunn Rank Sum Test with function dunnTest( ). However, after assigning the output of the test to an object (dunn.iris), I am unable to…
chiliconcarno
  • 15
  • 6
1
vote
0 answers

how can I change the header name in post hoc test result table?

I want to clarify the name of each row and column with specific name. however, it's shown only with the number (1,2,3,4,5...). I performed post hoc test named as dunn's test, after kruskal wallis test for non-parametric graph. sp.posthoc_dunn(data,…
jay
  • 99
  • 6
1
vote
1 answer

get significantly different groups from dunn test in R

In R, I compare groups with the dunn.test. Here is some example data, where "type" is the grouping variable: my_table <- data.frame ("type" = c (rep ("low", 5), rep ("mid", 5), rep ("high", 5)), "var_A" = rnorm (15), …
yenats
  • 531
  • 1
  • 3
  • 16
1
vote
0 answers

Does Dunn's test (particularly the Z-statistic) say anything about direction?

I have conducted a Dunn's test to compare the distribution of factor scores across three nominal variables. How do I interpret the signs of the Z-statistic? Do Z-statistics say anything about direction?
Jo3
  • 11
  • 1
1
vote
0 answers

What is the best way to manage/store result from either posthoc.krukal.dunn.test() or dunn.test() - where my input data is in dataframe format?

I am a newbie in R programming and seek help in analyzing the Metabolomics data - 118 metabolites with 4 conditions (3 replicates per condition). I would like to know, for each metabolite, which condition(s) is significantly different from which.…
Pearl_Lo
  • 11
  • 3
1
vote
1 answer

Tidyverse solution to grouping, and looping through dataframe to perform dunn.test

I have an example dataframe below. example.df <- data.frame( species = sample(c("primate", "non-primate"), 50, replace = TRUE), treated = sample(c("Yes", "No"), 50, replace = TRUE), gender = sample(c("male", "female"), 50, replace = TRUE), var1…
jaydoc
  • 79
  • 1
  • 7
1
2 3