sorghum: Completely Randomized Design (CRD)
In jcfaria/ScottKnott: The ScottKnott Clustering Algorithm

Description Usage Format Details Source Examples

The experiment consists of 16 treatments (cultivars) of sorghum conducted in a balanced squared lattice design and the yield by plot (kg/plot).

1 2	data(sorghum) sorghum

An incomplete balanced block design with 4 blocks, 16 treatments, and 5 repetitions, that is, the yield of each treatment is measured 5 times. sorghum is a list with 4 elements. The first tr is a factor of lenght 80 with 16 levels describing the treatments. The second dm is data.frame describing the design matrix. Its columns are x, bl (blocks) and r repetitions. The third y is a numeric vector the yields. The fourth dfm is a data frame with four columns. The first tree columns are the design matrix and the fourth is y.

The experiment was conducted at EMBRAPA Milho e Sorgo (The Brazilian Agricultural Research Corporation, Corn and Sorghum section).

Ramalho, M.A.P. and Ferreira, D.F. and Oliveira, A.C. (2000). Experimentação em Genética e Melhoramento de Plantas. Editora UFLA, Lavras, Brazil, page 167.

library(ScottKnott)

data(sorghum) 

av <- aov(y ~ r/bl + x,
          data=sorghum$dfm)

sk <- SK(av,
         which='x',
         sig.level=0.05) 

summary(sk)

plot(sk)