replication of latin squares --- again
On 2 Apr 2003 at 11:57, lamack lamack wrote:
Dear all, this is a newbie's question.
I have a 4x4 latin square replicated 3 times. That is:
operators
batches 1 2 3 4
1 A B C D
2 B C D A
3 C D A B
4 D A B C
operators
batches 1 2 3 4
5 A B C D
6 B C D A
7 C D A B
8 D A B C
operators
batches 1 2 3 4
9 A B C D
10 B C D A
11 C D A B
12 D A B C
I have used the same operators but different batches.
How can I get the anova table for this design using R?
I have created a R object as
bathces operators treatment y rep
1 1 A y1 1
1 1 b b2 1
. . . . .
and so on
Something like , assuming the variables batches, operators, treatment, rep are factors and y is numeric, model <- aov(y ~ rep + batches + operators + treatment) or model <- aov(y ~ batches + operators + treatment) (which will give another parametrization of the same model) summary(model) Kjetil Halvorsen
I appreciate in advance. L.
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