如何在R中创建一个零值向量?
在数据分析中,有时我们需要对某些计算使用零,以使变量的影响无效或基于分析的目的用于其他目的。为了处理这种情况,我们需要一个零值或一个零向量。有很多方法可以创建一个在R中带有零的向量。重要的是向量的长度。
例子
> 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
检查这些对象是否都是矢量-
> 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
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