隨機化完全區集設計（RCBD）

R 的實驗設計

Joanne Xiong

Data Scientist

RCBDs

Randomized－在每個區集內隨機指派處理
Complete－每個區集中各處理出現次數相同
Block－將相似的受試單位分區集（例如依性別）
Design－你的實驗設計！

RCBD 流程

隨機化完全區集設計：農業實驗流程圖

agricolae

library(agricolae)
trt <- letters[1:4]
rep <- 4
design.rcbd <- design.rcbd(trt,
                           r = rep,
                           seed = 42,
                           serie = 0)
design.rcbd$sketch

     [,1] [,2] [,3] [,4]
[1,] "d"  "c"  "a"  "b" 
[2,] "b"  "a"  "d"  "c" 
[3,] "d"  "a"  "b"  "c" 
[4,] "a"  "b"  "d"  "c"

模型驗證－交互作用圖

with(dataset, interaction.plot(x.factor, trace.factor, response))
# example with the ToothGrowth dataset
with(ToothGrowth, interaction.plot(dose, supp, len))

交互作用圖：ToothGrowth 範例

一起來練習吧！

R 的實驗設計