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Group by time intervals and additional attribute...

Aggregation of text elements per id over the last 10 or 30 days in R...

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Aggregating Time Series Data by Arbitrary Time Periods...

Sum based on column condition...

SQL finding the average of a group by generated column...

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Is there any possible way to use the Aggregation class with yearly MongoDB request in the java/sprin...

Convert Array to Json in Mongodb Aggregate...

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MongoDB Aggregation question using summations / matches...

Collapsing a basic dataframe based on adjecent rows...

r aggregate or collapse specific column values by id...

R collapse date fields with conditions...

Aggregate data by year and override NA in row ONLY when value in column for that year...

Aggregate multiple rows based on common values...

collapse text by 2 ID's in a row...

R: collapse rows and change value according to condition in data frame...

How to add rows as sums of other rows in DataFrame?...

Apply several summary functions (sum, mean, etc.) on several variables by group in one call...

summerarize dplyr only gives one row (not plyr)...

Counting occurrences of values of string variable using collapse...

R - Collapse into vector same member of a list...

Collapse a log by date into an array of hashes...