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Questions tagged [pairwise.wilcox.test]

72 questions
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How to find Mann-whitney p value across all genes using R?

I need to perform mann-whitney test across all genes using R programming. I need to input a text file where first row contains samples, second row contains cohort variables (1 or 2),all other rows contains the gene expressions. This I need to do…
Ankita
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Wilcoxon test between the two target groups among each predictive feature

I have a pandas data frame with a target variable, which is binary (classes progressive / non-progressive), that I want to predict. Before making the model I want to do some feature selection, and that is by comparing the density distribution of…
Programming Noob
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Compute multiple Wilcoxon Signed Rank tests by group in R

I'm working with (un-paired/independent) environmental data collected over 2 consecutive months that I'd like to compare for each calendar year (CYR). I have many years and several months of data so running each test one by one is too tedious. I…
Nate
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How to run paired wilcoxon test for multiple variables

I'm a beginner on R Studio and writing my thesis, I would like to run a wilcoxon test for 5 variables dispatched in 2 groups, a full sample and a control sample, and to avoid creating 5 different dataframes I want to run it in one command. The…
Simon
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Pairwise comparisons with given means and standard deviations

So I got this data (from a real annoying software package which doesnt give me all the data-points as an export) where I only get means and SDs....so not all the data which produces these means and SDs. How can do pairwise comparisons with just the…
H. berg
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Multiple wilcox.tests across columns using variables in first column (R)

I have this data.frame df <- data.frame( variable=c(2.4860651, -0.68863024, 2.63530974, -2.95754943, 1.67945091, 2.63530974, 4.79002539, 2.32575938, 3.57236441, -0.364825998, -2.00646016, -3.12380516, 0.69307013,…
Sylvia Rodriguez
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Wilcoxon sum rank test Confidence interval doesn't contain estimate

I am trying to compare two groups using Wilcox.test() function in R. The test works fine but there is something weird about the 95% confidence interval for the location shift parameter. It doesn't contain the estimate, what could be the reason? Here…
mutinda festus
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R: how to compute a power analysis based on a wilcoxon test for paired observations (Wilcoxon signed-rank test)

I want to know if my study and my statistical test is powerful. I have 16 subjects, all of them took both treatment1 and treatment2. I want to know if the study is powerful by conducting a power analysis to determine the power of the study. Group 1…
learners
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Effect Size for Wilcox-Mann-Whitney in R Cohen's d

I have a non-normal distribution data of two independent samples os patients divides by two groups 'control' and 'treatment'. Would like to verify if there are difference between the two groups 'control' and 'treatment' and measure this difference,…
Elias
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R: Exact p-values Wilcoxon Matched Pairs Test with Ties

How can exact p-values be obtained for this test when there are ties? Wilcox.test returns warnings when this happens as shown: 1: In wilcox.test.default(x = c3a0, y = c3a1, alternative = c("two.sided", : cannot compute exact p-value with ties 2:…
user19315317
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Checking R code and this debug error: unexpected '}' in "}"

I just need some feedback on a very simple code I made, it's also saying Error: unexpected '}' in "}", and I wonder if this is a unicode issue? Any feedback would be appreciated!! My data is here: joint.sexdiff.csv I'm a really really new coder, and…
Yuliya Deni Krushni Nikolayeva
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Error: grouping factor must have exactly 2 levels

I know that many have asked the exact same thing, but nothing solved it for me... I want to compare the size of a morphological structure between two age groups (which I call BW and brownish), I'm sure I only have these two categories and there are…
Tarso Ciolete
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Denote pairwise significance labeling with letters

I have to label pairwise comparisons on a graph with letters. If the letters are the same, then they are not statistically different, and if they are statistically significant then the letters are different. My data are not normal, I know how to use…
sarah99
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Wilcoxon Signed-Rank Test to check improvement in the group

I want to check whether a non-normal distributed group has improved over a period of time or not. To check the statistically significant difference between the group at time t1 and time t2, we can use Wilcox Signed-Rank non parametric test. The…
Harsh Panchal
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running paired wilcoxon test on rows of two dataframes

I have a two large dataframes (around 19000 rows and 71 columns) as…
sherbman
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