r - 相对频率表怎么画

Question

Src=as.factor(c("nc","us","us","nc","nc","ci","nn","pr","nc","nc","ak","ak","ak","ak","ci","hv","ak","ci","nc","nc"))
Version = as.factor(c(0,4,7,0,0,0,9,0,0,0,1,1,1,1,0,2,1,0,0,0))
table(Src,Version)

输出:

    Version
Src  0 1 2 4 7 9
  ak 0 5 0 0 0 0
  ci 3 0 0 0 0 0
  hv 0 0 1 0 0 0
  nc 7 0 0 0 0 0
  nn 0 0 0 0 0 1
  pr 1 0 0 0 0 0
  us 0 0 0 1 1 0

我可以不显示计数，而是显示相对频率吗？

Answer 1

当然。你可以使用 prop.table() 达到这个效果:

prop.table(table(Src, Version))

这将生成如下表格:

    Version
Src     0    1    2    4    7    9
  ak 0.00 0.25 0.00 0.00 0.00 0.00
  ci 0.15 0.00 0.00 0.00 0.00 0.00
  hv 0.00 0.00 0.05 0.00 0.00 0.00
  nc 0.35 0.00 0.00 0.00 0.00 0.00
  nn 0.00 0.00 0.00 0.00 0.00 0.05
  pr 0.05 0.00 0.00 0.00 0.00 0.00
  us 0.00 0.00 0.00 0.05 0.05 0.00

您可以使用可选参数 margin 来请求行或列的相对频率。