[R] kruskal wallis post hoc?

gaiarrido gaiarrido at usal.es
Thu Jan 12 09:43:01 CET 2012


Try to use "kruskalmc" in the package pgirmess

I give one of my results


> kruskal.test(rojos~mes)
Kruskal-Wallis chi-squared = 132.3091, df = 3, p-value < 2.2e-16

> kruskalmc(rojos~mes)
Multiple comparison test after Kruskal-Wallis 
p.value: 0.05 
Comparisons
              obs.dif critical.dif difference
abril-julio 134.52815     56.84018       TRUE
abril-junio  53.42185     58.73584      FALSE
abril-mayo   58.96383     59.73167      FALSE
julio-junio 187.95000     44.40539       TRUE
julio-mayo   75.56432     45.71446       TRUE
junio-mayo  112.38568     48.05106       TRUE



-----
Mario Garrido Escudero
PhD student
Dpto. de Biología Animal, Ecología, Parasitología, Edafología y Qca. Agrícola
Universidad de Salamanca
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