WebApr 4, 2024 · The duplicated () is a built-in R function that checks which elements of a vector or data frame are duplicates. It returns a logical vector suggesting which elements (rows) are duplicates. Syntax duplicated (data, incomparables = FALSE, fromLast = FALSE, nmax = NA, …) Parameters data: It is a vector, data frame, array, or NULL. WebMar 22, 2024 · counting the number of duplicate records by group General dplyr, rstudio shp5009 March 22, 2024, 6:47pm #1 I'm trying to create counts by channel. So I can figure out how many purchases an individual made by channel.
r - Count the number of duplicate for a column - Stack Overflow
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How to count the number of duplicate rows in an R data frame
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