Posts Tagged ‘ PERMANOVA ’

Two-Way PERMANOVA (with Vegan-Function adonis) Using Customized Contrasts

August 8, 2011
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Two-Way PERMANOVA  (with Vegan-Function adonis) Using Customized Contrasts

...say you have a multivariate dataset and a two-way factorial design - you do a PERMANOVA and the aov-table (adonis is using ANOVA or "sum"-contrasts) tells you there is an interaction - how to proceed when you want to go deeper into the ana...

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Adonis (PERMANOVA) – Assumptions

April 26, 2011
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Adonis (PERMANOVA) – Assumptions

Before you use PERMANOVA (R-vegan function adonis) you should read the user notes for the original program by the author (Marti J. Anderson) who first came up with this method. An important assumtption for PERMANOVA is same "multivariate spread&qu...

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Multivariate Repeated Measurements With adonis():

April 18, 2011
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Multivariate Repeated Measurements With adonis():

Lately I had to figure out how to do a repeated measures (or mixed effects) analysis on multivariate (species) data. Here I share code for a computation in R with the adonis function of the vegan package. Credit goes to Gavin Simpson providing most of ...

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