Creating a vector of conditional sums
121414
Aggregate data in R
54521
Making all row sums and column sums non-negative by a sequence of moves
38741
Finding a general formula for summation
5136
How to sum a variable by group
28109
Conjectural closed-form representations of sums, products or integrals
116051
Using SUM on FLOAT data
141
How to create a function to sum the required multiple column
148454
how many linearly independed vectors combinations may I extract from a set of vectors
105097
Calculating sum of squared deviations in R
145430
Reindexing some values in a vector
70041
Sum with parameter convergence
44649
Summing a series having a geometric component
14151
Checking for duplicates in a vector
112754
Create grouping variable for consecutive sequences and split vector
123986
Approach to solve conditional probability
106753
Conditional expection of gamma distribution on sum
128196
Conditional Gathering of lists