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alexis_laz

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1516.53 (40,103rd) 		Reputation
10,928 (13,739th)
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Title Δ
Find first occurrence of a pattern by row -0.21
How can I parallelize combn()? -0.59
Find a vector in matrix when order matters in R -0.41
Generate an accumulated array of strings from a string array -1.68
Fastest way to find the index of the maximum of each row +1.15
R Create column based on previously observed value -1.85
match certain value of one vector with range of values of other vec... +1.14
Index in a dist matrix (1D vector) equivalent to 2D matrix indices,... +0.49
Function to summarize vector of numbers as a string? +2.11
Select values within/outside of a set of intervals (ranges) R +0.37
Expand a matrix of counts +1.29
Using `which` with list components of length larger than 1 0.00
Count flags across multiple rows depending on key -0.91
Add columns of a matrix based on values of another vector -1.59
Concatenate individual genomic intervals into populational regions +0.94
Extract last non-missing value in row with data.table +1.66
Imitate Matlab Matrix behavior 0.00
R address function 0.00
Modifying an R factor? 0.00
match() values with tolerance -1.84
How to apply function in each row in data.table -0.71
How do I visualize a 3 dimensional matrix? -0.23
R: count how many letters match from beggining of string +0.47
How to index a vector sequence within a vector sequence +1.72
Efficient Collapse Dummy Variables +0.67
R Find the frequency and duration a wave is above a given value usi... -0.98
Cumulative sum that resets when 0 is encountered -0.16
R: Percentagewise interaction of variables by group +0.84
grouping multiple variables - R -0.39
Sliding window over data.frame with nested hierarchy +0.47
apply diff() only on consecutive days +1.31
Change numbers of a vector based on "group" size +1.43
Fill 'NA's in data frame with information contained in one... -0.48
Select all binary neighbors of decimal number +2.36
Different execution times for matching element +0.49
Faster way of converting a variable length list into a data frame i... +2.59
Alternatives to nested ifelse statements in R +0.32
Mean all other other columns based on a single column in r +0.26
Creating a matrix of multiple counters in R -1.32
find nearest smaller number -1.38
Fastest way to transpose a list in R / Rcpp -1.30
Add every five lines in the column then divide by ten? +0.44
Find fastest way to get all intervals between identical elements in... +0.36
R force argument missingness - R_MissingArg 0.00
How to merge a character vector conditional on cells of a numerical... -0.13
Combine list element by column name to make a dataframe -0.56
Efficiently sum entire rows which are related through a different m... 0.00
Repetitive sum of a number of columns without for loop in R -0.37
Convert a column into multi column by groups -0.64
Is the "*apply" family really not vectorized? +2.65