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}
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}
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\examples{
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\examples{
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## For a simple example see example(aov)
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## For a simple example see example(aov)
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# Cochran and Cox (1957, p.164)
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# Cochran and Cox (1957, p.164)
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# 3x3 factorial with ordered factors, each is average of 12.
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# 3x3 factorial with ordered factors, each is average of 12.
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CC <- data.frame(
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CC <- data.frame(
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    y = c(449, 413, 326, 409, 358, 291, 341, 278, 312)/12,
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    y = c(449, 413, 326, 409, 358, 291, 341, 278, 312)/12,
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    P = ordered(gl(3, 3)), N = ordered(gl(3, 1, 9))
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    P = ordered(gl(3, 3)), N = ordered(gl(3, 1, 9))
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)
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)
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CC.aov <- aov(y ~ N * P, data = CC , weights = rep(12, 9))
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CC.aov <- aov(y ~ N * P, data = CC , weights = rep(12, 9))