多个令牌的频率对

Question

具有这样的数据框：

df <- data.frame(id = c(1,2,3,4), stocks = c("google stock, yahoo product stock", "google stock, yahoo product stock","yahoo product stock", "google stock"))

如何获取这样的配对频率表：

google stock - yahoo product stock 2
google stock                       1
yahoo product stock                1

Answer 1

您想要这样的东西吗？

df <- data.frame(id = c(1,2,3,4), stocks = c("google stock, yahoo product stock",
                                             "google stock, yahoo product stock",
                                             "yahoo product stock",
                                             "google stock"))

table(df$stocks)