R Count Unique Values In Column

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R count unique values for every column youtube

R Count Unique Values For Every Column YouTube

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 Values by Group df group by grouping column summarize count distinct n distinct values column Viewed 51k times. Part of R Language Collective. 31. I would like to return the count of the unique (distinct) values for every column in a data frame. For example, if I have the table: Testdata

Count unique values in column by using r data cornering

Count Unique Values In Column By Using R Data Cornering

R Count Unique Values In ColumnThe 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 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