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Top Questions
20
votes
Why does R's duplicated perform better on sorted data?
r
performance
sorting
duplicates
asked Dec 27 '16 at 20:59
stackoverflow.com
11
votes
Arithmetic in R faster on numerics as opposed to integers. What's going on?
c++
c
r
performance
rcpp
asked Aug 18 '18 at 18:47
stackoverflow.com
10
votes
Accurate modular arithmetic with double precision
c++
performance
algorithm
floating-point
asked Feb 4 '18 at 18:37
codereview.stackexchange.com
8
votes
R Algorithm for generating all possible factorizations of a number
r
algorithm
factorization
asked Apr 27 '15 at 20:39
stackoverflow.com
6
votes
Most efficient way to determine if element exists in a vector
r
performance
optimization
vector
asked Oct 31 '15 at 15:14
stackoverflow.com
5
votes
Performance Considerations when using VBA Filter Function
arrays
excel
algorithm
vba
sorting
asked Oct 27 '15 at 15:12
stackoverflow.com
Top Answers
31
How to generate permutations or combinations of object in R?
stackoverflow.com
23
vba: get unique values from array
stackoverflow.com
18
Efficient calculation of var-covar matrix in R
stackoverflow.com
12
Faster version of combn
stackoverflow.com
12
Matematical way to compare a pair of 3 variables
stackoverflow.com
11
Find all combinations of a set of numbers that add up to a certain total
stackoverflow.com
10
Compare Matrices in R efficiently
stackoverflow.com
9
R Function for returning ALL factors
stackoverflow.com
9
Concise Proof of the Monty Hall Problem in R
codereview.stackexchange.com
8
Picking unordered combinations from pools with overlap
stackoverflow.com
7
R Function for returning ALL factors
stackoverflow.com
7
Rcpp fast statistical mode function with vector input of any type
stackoverflow.com
7
Find the mean from the permutations in R
stackoverflow.com
6
Generating all factors of a number given its prime factorization
stackoverflow.com
6
Indexing the elements of a matrix in R
stackoverflow.com
6
Generate a list of primes up to a certain number
stackoverflow.com
6
R Function for returning ALL factors
stackoverflow.com
6
Moving average function in C++ for use with R
codereview.stackexchange.com
6
Compute N random permutations of a vector of 36 elements
stackoverflow.com
6
Finding all possible combinations of numbers from a vector to reach a given sum (No repetitions)
stackoverflow.com
6
Using R to solve the Lucky 26 game
stackoverflow.com
6
Any faster way to check if lists in a list are equivalent?
stackoverflow.com
5
R: Conditional summation of a numeric vector
stackoverflow.com
5
R factor function running slow with long dataframe
stackoverflow.com
5
Keep which(…, arr.ind = TRUE) results that connect
stackoverflow.com
5
Constrained matrices
stackoverflow.com
5
Listing all possible combination without repetition,VBA
stackoverflow.com
5
Unordered combinations of all lengths
stackoverflow.com
5
Count of combinations with repetitions
stackoverflow.com
5
Implementing function to detect if a number is prime using any() in R
stackoverflow.com
1
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