将唯一值从一个数据框中复制到 R 中的另一个

Question

I have two data frames with totally different column names and values.我有两个具有完全不同列名和值的数据框。

Example :例子：

Data Frame 1 ->数据帧 1 ->

company value
A       10
B       11
A       9

Data Frame 2 ->数据框 2 ->

id     value2
Q       7
W       8
E       9

This question has several parts that I want to achieve:这个问题有几个我想要实现的部分：

Extract the unique values of COMPANY column from data frame 1 based on the COMPANY column(Unique companies)根据 COMPANY 列（唯一公司）从数据框 1 中提取 COMPANY 列的唯一值
Copy the unique values obtained above into a NEW COLUMN in Data Frame 2 RANDOMLY (only company field)将上面获得的唯一值随机复制到数据框 2 中的新列中（仅限公司字段）
Merge the two data frames based on the unique value column.(This is only for testing, hence why I need this step)根据唯一值列合并两个数据框。（这仅用于测试，因此我需要这一步）

All help is appreciated!!感谢所有帮助！ Thank you in advance.先感谢您。

Answer 1

You could try something like this:你可以尝试这样的事情：

company <- unique(df1$company)
df2$new_column <- sample(company, nrow(df2), replace = TRUE)