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alexis_laz

Rating
1516.53 (40,103rd) 		Reputation
10,928 (13,739th)
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Title Δ
Selecting rows conditional on column value from multiple matrices -0.10
Creating matrix of colnumbers from a vector +2.07
Minimum distance between two elements in same vector (r) +2.18
% of matching between rows and find duplications based on specific... -0.01
Is there a superfast way to transform data frame rows to list eleme... +2.18
Row sums of matrix over/under diagonal 0.00
Mean of vector inside of list of lists -0.23
Reshape Data Frame from Long to Wide with Condensed Columns -1.07
test criteria for a moving window of 3 rows in a data frame +0.56
Merge data frames with partial id -1.18
R conditional variable for longitudinal data +2.57
Subsetting while working with list, dataframe and matrix +2.19
matrix operations and component-wise addition using data.table -1.18
Data Transformation in R, append column name into row and unlist fr... 0.00
Compare each row with other rows of matrix 0.00
Populate a dataframe with a value from a vector when the value of a... +2.14
create frequency tables using rollapply() in R -0.06
Filling R matrix using 1 column of data -1.35
How to roeder the rows of one matrix with respect to the other matr... -0.18
Divide one column of a data.table by an integer depending on anothe... -0.34
How do I do a conditional sum which only looks between certain date... -0.93
Add “delta” columns to a matrix, containing the difference values b... +0.49
How do I emulate outer + list? -0.77
aggregate data in irregular groups in r (any better title?) 0.00
Compute bi-monthly overlap fraction +1.77
generalized aggregate by row +1.68
in R: turn list of functions into one big function (element-wise su... -0.55
Vectorizing diff function on lags in R +1.34
Join matrices by both colnames and rownames in R +0.51
check whether a variable is in increasing order in R +2.64
stratified sampling with group size below sample size in R 0.00
create a column based on dense observations 0.00
How to extract value of a column based on multiple other columns +0.30
R: Merging factor levels and creating sum in merged columns 0.00
R How to apply function to several subsets +2.41
Pairs of Observations within Groups 0.00
R: Searching & isolating multiple first occurences in time series 0.00
How to assign "cut" range midpoints in R? 0.00
How to compute correlations between all columns in R and detect hig... +0.47
calculating the euclidean dist between each row of a dataframe with... -2.03
R - Divide each value in matrix by maximum value of its row/column -0.32
Overwrite values of existing dataframe +0.51
Split time period by calender intervals and ID 0.00
Sum Time Interval Data by Day in R with Overlapping Dates +1.83
r function to compare values for successive levels of a factor for... 0.00
How to merge overlapping integer vector elements of a list in R -2.27
R: matrix double summation and normalization by vectors 0.00
how to get row and column value of different parameter in r? 0.00
Continually adding to a string given different if else statements [R] +4.52
Number of unique values within a range in data-frame +0.16