随机完全区组设计（RCBD）

R 中的实验设计

Joanne Xiong

Data Scientist

RCBDs

随机——在每个区组内随机分配处理
完全——每个区组中各处理重复次数相同
区组——按相似特征分组（如性别）
设计——这就是你的实验！

RCBD 工作流程

流程图

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"

模型验证——交互作用图

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

交互作用图

Passons à la pratique !

R 中的实验设计