R: Sum every n rows of one column of data frame

I need to insert a total at the bottom of a dynamic table in Excel VBA

Sum within a column given two or more conditions in MySQL

Sum subsequent entries (replicates) in data.frame

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check sum of distincts in one column with a distinct sum of another set in the same table

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SUMIF() in JavaScript?

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Using a variable as a column name used in HAVING SUM(@variable)

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MySQL SUM function not working for multiple rows order by categori Id

Ruby - "Vending Machine" Change Giving

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Get multiple sums for a vector including many factor-levels devided by NA's

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Recognising specific occurrences across columns to create a new variable

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Selectively Combine R Dataframe through Index

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Excel if with nested functions possible?

Python Pandas: Sort and group by, then sum two consecutive rows of 2nd column for a specific value of a 3rd column

Discrepancy between python sum(list) and reduce(lambda x, y : x+y, list)?

I need help calculating two Access form text-boxes together when form opens

I am trying to iterate over the return value of a function which returns a tuple of 3 tuples

SQL cursor SUM VARCHAR duplicate

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How do i add SUM with multiple WHERE condition?

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MS Access: Sum Multiple Fields In A Record And Show Sum In Another Field

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Followup for searching directory for a specific file extension and performing a sum to add their contents together

SUM() Returning Incorrect Values

How to SUM specific cells in a range depending on the posistion and value of different cells in another range?

how to use annotate to sum up all rows and get the avg? django

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How to make sql hive when i have input this?

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SUM and GROUP BY 2 different values

Java Sql 'select sum' giving incorrect value

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Excel VBA Merge and sum Lists error 429 Active X cant create object

Aggregate based on year and ID in R

How to find the sum of values from given SQL file?

Simultaneously sum two keys in list of dicts by multiple items

SQL SUM then count?

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run type error 13 type mismatch with sumif with or

SUMIFS with multiple criteria in one range using vba

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I want to summarize by a column and then have it take the sum of 1 column and the mean of another column

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How to sum data that is determined by a grouping

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What could be the cases where the following approach to find a triplet of given sum fails?

Sum up Adjacent columns in sql

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SQL Server : partial group by on single column

MSSQL Skip Group by on Sum column

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Average the sum of rows without a creating new column in Excel

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Summing up values from one column into one row on a different table when joining

SQL Sum for every day

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how to 0.1 Comparision operators in python bug fix

Python sorts months according to alphabet letters instead of months order

Is there a way to sum just specific entries of a vector?

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How do I pairwise sum two slices when collect() cannot determine the type?

Pandas : How to sum column values over a date range

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Finding the sum of Surveys from different city

COUNTIFS (/w multiple rows & criteria)