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using r to count character occurrences in multiple columns of data.frame...

Count unique matching items with filter as a calculated column...

Summary data by column in R...

Using mtcars data to make a summarised table of cylinders versus centered(mpg)...

Using summarise() to count the number of times the min value is repeated...

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Pass a concatenated string as column name in dplyr::summarise...

Summarise a column and thereby remove unwanted NAs in others...

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summarize from two differents rows...

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mutate or summarise across rows by variable containing string...

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Aggregate observations across samples by rownames (dplyr) in R...

How to summarize number of products purchased by a customer based on a product list in R...

Summarise(across(where)) in R...

Performing operation among levels of grouped variable in R/dplyr...

R check and count Strings in a vector, group_by, considering order of appearance of the strings...