[R] multiple groups anova

Olivier Crouzet olivier.crouzet at univ-nantes.fr
Thu Jun 12 09:10:52 CEST 2014

Hi Stanley,

You need to convert your dataframe (it's'not a matrix obviously) to a "long format". Each measurement will then be a single line within this "table".

Each column will then be viewed as a single statistical variable. Then you will learn to apply relevant anovas on such data.

Essentially, you need to read an introduction to R.


Olivier Crouzet
LLING - Laboratoire de Linguistique de Nantes - EA3827
Université de Nantes

-----Original Message-----
From: Dragana Stanley <d.stanley at cqu.edu.au>
Sender: r-help-bounces at r-project.orgDate: Thu, 12 Jun 2014 14:21:53 
To: r-help at r-project.org<r-help at r-project.org>
Subject: [R] multiple groups anova

Hi All

I have a matrix on which I want to do ANOVA between different Groups. My matrix looks something like this

Sample      Group        Mes1          Mes2          Mes3
sample1    Group1      10     0       5
sample2    Group1      2       0       1
sample3    Group1      2       0       1
sample4    Group1      2       0       3
sample5    Group2      6       2       1
sample6    Group2      10     1       0
sample7    Group2      4       0       10
sample8    Group2      7       0       2
sample9    Group3      7       5       2
sample10  Group3      0       4       2
sample11  Group3      3       0       6
sample12  Group3      4       0       5

where Mes1-Mes100 columns are numerous measurements (like for example different genes or sequence counts) taken on each sample

Is there simple way to do anova between different groups and effect size measure (ie summary)


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