R language dplyr package bind_ The rows function merges the rows of the two dataframes vertically. The final number of rows is the sum of the rows of the original two dataframes (combine data frames)

R Language dplyr package bind_rows The function takes two dataframe Rows of data are vertical （ vertical ） combined 、 The final number of lines is the original two dataframe Sum of rows （Combine Data Frames）

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