Non parametric N-way analysis of variance
25 visualizaciones (últimos 30 días)
Mostrar comentarios más antiguos
Francesca Danielli
el 17 de En. de 2024
Comentada: Francesca Danielli
el 18 de En. de 2024
Hi everyone! I had to perform a multifactorial test analogous to N-way ANOVA ("anovan" function) but suitable for non-normal distributed data. I know that there is Kruskal-Wallis test, but it seems that only the one-way option is available in Matlab. Do you know if there is an alternative for the N-way in Matlab?
0 comentarios
Respuesta aceptada
Jeff Miller
el 17 de En. de 2024
No, there isn't one. This isn't actually a Matlab limitation, but rather a statistical one, because there simply isn't a clear nonparametric analog of ANOVA. One reason is that interactions in ANOVA reflect differences in differences, but these aren't at all meaningful with nonparametric data.
One thing people often do is to convert all of the original scores to ranks and then do ANOVA on the ranks. That can work pretty well if the problem with the original data is that there are a few really extreme scores that would unduly influence their condition means.
Probably more commonly, people just ignore the normality requirement and rely on the fact that ANOVA is pretty robust to violations of this assumption.
Más respuestas (0)
Ver también
Categorías
Más información sobre Analysis of Variance and Covariance en Help Center y File Exchange.
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!