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Take oldest record in a set of rows...

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Python group list into subgroups with constraints...

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How to group in a specific order in Kendo ASP.NET MVC...

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How to group data not matching a condition in Postgres...

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How to simplify repetitive actions for mulitple groups in data frame?...

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R - create summary table of means and counts by group for multiple columns...

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Numbering array by month and reset to 1 on new month and year...

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What is the fastest way of creating an identificator for multi-row groups with data.table in R?...

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Power query calculate Percentage of changes in marks...

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Java group by custom variable and return same object...

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How to replace na in a column with the first non-missing value without dropping cases that only have...

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Reducing an array to return grouped data from schools to local authorities...

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How to group consecutive data in 2d array in python...

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Power Query Transform data within Group/Buckets...

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Concatenate distinct strings in to a new column, partitioned by an ID?...

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R roll mean on a non continuous time serie...

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Select top N rows from each group...

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Grouping into desired number of groups...

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Subset dataframe based on large values of a column per month...

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Making a nested list with a dataframe in R...

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Writing a function in R with 3 different grouping variables...

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Group string by 3 character to a List...

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How to group the rows of a csv file based on some pattern of a column?...

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Grouping reactive input generates empty output-plot...

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sort rdd by two values and get top 10 per group...

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How to impute data based on subgroup and date in R...

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How to group elements in a list in with respect to another list in Python3?...

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Joining/grouping in R...

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