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Legal Studies如何在 R 程式中建立一個值為零的向量？
在資料分析中，有時候我們需要在特定計算中使用零，要麼是為了抵消變數的影響，要麼是基於分析目標的其他一些目的。為了應對這種型別的情況，我們需要使用一個零值或向量，可以透過多種方法在 R 中建立一個值為零的向量。重點是向量的長度。
示例
> x1<-integer(10) > x1 [1] 0 0 0 0 0 0 0 0 0 0 > x2<-integer(20) > x2 [1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > x3<-numeric(10) > x3 [1] 0 0 0 0 0 0 0 0 0 0 > x4<-numeric(20) > x4 [1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > x5<-replicate(10,0) > x5 [1] 0 0 0 0 0 0 0 0 0 0 > x6<-replicate(100,0) > x6 [1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 [38] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 [75] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 > x7<-(1:10)*0 > x7 [1] 0 0 0 0 0 0 0 0 0 0 > x8<-(1:50)*0 > x8 [1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 [39] 0 0 0 0 0 0 0 0 0 0 0 0 > x9<-rep(0,10) > x9 [1] 0 0 0 0 0 0 0 0 0 0 > x10<-rep(0,40) > x10 [1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 [39] 0 0 > x11<-rep(0L,10) > x11 [1] 0 0 0 0 0 0 0 0 0 0 > x12<-rep(0L,100) > x12 [1] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 [38] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 [75] 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0 0
檢查這些物件是否為向量 -
> is.vector(x1) [1] TRUE > is.vector(x2) [1] TRUE > is.vector(x3) [1] TRUE > is.vector(x4) [1] TRUE > is.vector(x5) [1] TRUE > is.vector(x6) [1] TRUE > is.vector(x7) [1] TRUE > is.vector(x8) [1] TRUE > is.vector(x9) [1] TRUE > is.vector(x10) [1] TRUE > is.vector(x11) [1] TRUE > is.vector(x12) [1] TRUE
更新於： 04-Sep-2020
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