使用R中的列表向dataframe中的列添加重复

您好，简单的R问题，但是让

列表A

中的每个项目在data.frame中重复一次

列表B

中的每个项目的最佳方式是什么

List_A = c("a","b","c")
List_B = c("one","oneb","two","twoa","three","threea")

期望输出：

data.frame(List_A = c("a","a","a","a","a","a","b","b","b","b","b","b","c","c","c",,"c","c","c"),
List_B = c("one","oneb","two","twob","three","threeb","one","oneb","two","twob","three","threeb","one","oneb","two","twob","three","threeb"))

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在遵循@HubertL的建议后，我能够通过重复的

列表\u B

获得数据帧

expand.grid(List_A=List_A, List_B=List_B)

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expand.grid（List\u A=List\u A，List\u B=List\u B）

@HubertL工作得很好。