All Questions
Tagged with nonparametric r
235
questions
6
votes
1
answer
3k
views
Non-parametric regression
I am conducting a mulitple first order regression analysis of genetic data. The vectors of y-values do not all follow a normal distribution, therefore I need to implement a non-parametric regression ...
6
votes
2
answers
942
views
Subsets not significantly different but superset is
I have various clinical data on participants in a study. I'm looking at a continuous variable ("A") and a (binary) categorical variable (group) ("O"). I used a Wilcoxon test in R (the data are not ...
- 1,261
63
votes
7
answers
54k
views
Which permutation test implementation in R to use instead of t-tests (paired and non-paired)?
I have data from an experiment that I analyzed using t-tests. The dependent variable is interval scaled and the data are either unpaired (i.e., 2 groups) or paired (i.e., within-subjects).
E.g. (...
- 14.3k
19
votes
2
answers
6k
views
Nonparametric Bayesian analysis in R
I am looking for a good tutorial on clustering data in R using hierarchical dirichlet process (HDP) (one of the recent and popular nonparametric Bayesian methods).
...
- 6,712
9
votes
1
answer
2k
views
Alternative to the Wilcoxon test when the distribution isn't continuous?
One of the assumptions for using the Wilcoxon sign-rank test is that the underlying distribution is continuous (see here.)
However, there are cases (for example, when analyzing Likert scale data) ...
- 21.8k
7
votes
3
answers
1k
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How to do factorial analysis for a non-normal and heteroscedastic data?
I designed a field experiment with 4 independent factors but data is not normal and heteroscedastic. Friedman test (agricolae package) from R only fits for rbd. Can anybody suggest how to analyze my ...
- 131
6
votes
3
answers
2k
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What is a meaning of "p-value F" from Friedman test?
I'm a new R user and had just tried running friedman on non-normal and heteroscedastic data on seagrass. I am testing whether biomass is significantly different between sites across years. R (...
- 131
9
votes
4
answers
6k
views
Multi-way nonparametric anova
I have to analyze a factorial design with five factors (one of them nested in another one) and numeric responses. I would like to perform a nonparametric ANOVA, but of course I can't use neither ...
Stefania
9
votes
3
answers
10k
views
How can I obtain some of all possible combinations in R?
Sometimes I want to do an exact test by examining all possible combinations of the data to build an empirical distribution against which I can test my observed differences between means. To find the ...
- 18.9k
19
votes
3
answers
18k
views
A non-parametric repeated-measures multi-way Anova in R?
The following question is one of those holy grails for me for some time now, I hope someone might be able to offer a good advice.
I wish to perform a non-parametric repeated measures multiway anova ...
- 21.8k