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alexis_laz

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1516.53 (40,103rd) 		Reputation
10,928 (13,739th)
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R - How to find a previous row's value and use in calculation? 0.00
Transposing data +4.20
Find sequences of NA values in data.frame rows +1.21
How do I use the 'values' function of the hash package with unclass... 0.00
R + Lookup algorithm to match values within a range of identical el... -2.15
Aggregating one matrix by values in another matrix +4.26
R get all combinations for columns and perform a function on them r... -3.81
R aggregate data.frame with condition from second dataframe -0.64
convert a string into value in R -3.69
How to vectorize comparing each row of matrix with all other rows 0.00
How to convert from category to numeric in r +1.14
Find index of specific column in R +0.61
Replace a given character in a string variable with a character fro... +2.50
Create new data frame columns with binary (0/1) data based on text... -2.70
Counting column data in a matrix with resets +1.10
How to aggregate data from 5 minutes to 30 minutes while keeping da... -1.17
Remove the sequence of at least N consecutive values in a vector +2.82
Multiple loops following string and subsets -2.97
Filling data frame with previous row value +0.81
2D Movement simulation in R +0.18
R - List of combinations with outer() and expand.grid() 0.00
Group variables in a dataframe R using a specific list +0.36
Calculate realized monthly values by quarter -3.91
Reshaping a data in R +0.20
Identify gaps in a continuous time period +3.56
Random sample from each factor levels 0.00
Number of active items in bins 0.00
Checking to see if vector only has positive single-digit numbers (i... -2.43
Searching for a particular element in multiple data frames and to d... 0.00
Rename factor levels based on a condition in R -0.14
How to get lastest value based on date in R? +4.19
R - Comparing values in a column and creating a new column with the... -2.07
characters counting and subletting specific patterns 0.00
Add a column of derived data to a data.frame +4.15
What is an efficient way to fix the issue that a[b] may return vect... -3.76
How to create new column in dataframe based on partial string match... 0.00
Extracting row from a data frame according a criterion based if val... -1.78
How to calculate the weighted value without loop? -1.93
R use of lapply & sapply to interrogate list of matrices contai... +0.36
Match a list of items with rows items of a data.frame -2.45
R: how to add arguments to a function (in particular `...`)? 0.00
Efficiently calculating rolling row summation in R -1.43
How to generate a Graphical summary of a table using R 0.00
Plotting lines without for loops in R 0.00
Find min value between 2 sets of vectors (fastest way) +0.13
Summing labels line-section by line in r 0.00
Sum pairs of columns by group -3.59
Bar plot with multiple Ids on the same dates 0.00
Calculations on subsets of a data frame +4.14
Automate calculations in R 0.00