Count Unique Values In Column R

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Count Unique Values In Column R

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How To Count Unique Values In Excel Printable Templates

WEB Sep 22 2021 nbsp 0183 32 You can use one of the following methods to count the number of distinct values in an R data frame using the n distinct function from dplyr Method 1 Count Distinct Values in One Column n distinct df column name Method 2 Count Distinct Values in All Columns sapply df function x n distinct x Method 3 Count Distinct Mar 5, 2014  · 10 Answers. Sorted by: 37. You could use apply: apply(Testdata, 2, function(x) length(unique(x))) # var_1 var_2 var_3 .

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Count Unique Values In Column RJan 29, 2017  · The number of unique rows are computed directly without materialising the intermediate unique data.table and is therefore faster and memory efficient. You can use it with a data frame: df <- data.frame(some_col = c(1,2,3,4), another_col = c(4,5,6,7) ) data.table::uniqueN(df[['some_col']]) [1] 4 WEB Nov 18 2010 nbsp 0183 32 If you need to have the number of unique values as an additional column in the data frame containing your values a column which may represent sample size for example plyr provides a neat way data frame lt data frame v rep c 1 2 2 2 25 library quot plyr quot data frame lt ddply data frame v transform n length v

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