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R语言进行随机抽样
熊荣川
六盘水师范学院生物信息学实验室
http://blog.sciencenet.cn/u/Bearjazz
> x <- 1:12 #预设一个数组 > sample(x,4, replace = TRUE) #可重复抽样 [1] 8 7 3 8 > sample(x,4, replace = FALSE) #不可重复抽样 [1] 9 10 5 7
> x = c("zhou","wu","zheng","wang","xiong") #预设一个字符向量 > sample(x,4, replace = TRUE) #可重复抽样 [1] "xiong" "wu" "xiong" "wang" > sample(x,4, replace = FALSE) #不可重复抽样 [1] "wu" "zhou" "zheng" "xiong" |
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