jblood94 questions

jblood94 answers

• Efficiently find the number of different classmates from course-level data
• WorksheetFunction array size limit
• Speeding up simulations
• Vectorize an sapply function
• Find every combination meeting constraints
• Filtering the Results of Expand.Grid
• Compute N random permutations of a vector of 36 elements
• How can this R data.table join+group+summarise, operation be made a lot faster?
• Export different subsets of data.tables to each node in a cluster
• How to efficiently divide pairs into clusters such that each cluster contains all entries of a given set