[R] which test for seven groups with dependency in replication and discrete values

[Mendiburu, Felipe (CIP)]

Dear Ralph.

You can use the kruskal function of the library agricolae.
greetings.
Felipe

-----Original Message-----
From: r-help-bounces at r-project.org
[mailto:r-help-bounces at r-project.org]On Behalf Of Ralph Scherer
Sent: Thursday, September 13, 2007 5:44 AM
To: r-help at r-project.org
Subject: [R] which test for seven groups with dependency in replication
and discrete values


hello!

My Problem is, that I want to compare seven groups, which have the 
discrete values from 0 to 3. These are damageclasses of plants. 0 is 
best and 3 is worst. Every group has 4 replications with 2 plants. The 
two plants were together in a cage with animals. I think the problem is 
that the two plants are not independent from each other. I don't know 
which test I can use for this problem. I thought the chisquare test but 
I can't find it for more than two groups and I don't know how I should 
consider the dependence between the two plants of every replication. I 
want to find out if there are significantly differences between the 
groups. I hope someone could help me.

Thanks and greetings,
Ralph

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