989

989 has asked 19 questions and find answers to 59 problems.

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989 questions

Select the nth value of aggregated column after group by in R
Counting the number of ordered pairs in matrix in R
Extract sorted rows from matrix
All possible permutations of decimal numbers (hundredths) that sum up to 1 for a given length
Extract the first TRUE per row in logical matrix efficiently in R [duplicate]
doParallel (package) foreach does not work for big iterations in R
Generate m equally-spaced numbers that sum to 1 in R
Double precision (64-bit) representation of numeric value in R (sign, exponent, significand)
All possible combinations of two vectors while keeping the order in R
Extract sub-matrices from binary matrix in R

989 answers

R add vector content to data frame index
R: Subtract values from rows based on another column
Create group ID for runs of non-zero values
R convert large character string to dataframe
Grouping variables select first row (keep one column), last row (keep different column)
Replace NA with previous value with limit on number of consecutive NA
Merge data.frames between two lists by one single column
Create combinations of a binary vector
How can I reverse numbers in a vector ONLY if they are sequential?
R symbol background for custom symbols