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David Arenburg

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1732.38 (66th) 		Reputation
80,581 (1,024th)
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Title Δ
Is there a simple way of pairing unique data points in a data frame? +1.72
R - merge/combine columns with same name but incomplete data -0.73
R: pass function with multiple parameters to data frame rows, using... +0.35
cbind subsets into one column in r +1.80
Conditionally remove rows that match in column A, based on column B... +0.10
Calculate percentage of returned items of last order 0.00
How to look up values in R based on row and column +0.45
Format two kinds of factor dates in R -0.15
R data frame transformation values as names +1.20
Merging two data frames with different sizes by matching their colu... +0.11
R : adding a new column to an existing dataframe with a condition +0.35
Mean value between dates based on dates in another dataset using R +0.35
R - Number of days since last occurrence +1.60
Created table, by selecting from data frames when a match occurs +2.03
Select sets of values from R matrix column +0.35
Removing Only Adjacent Duplicates in Data Frame in R -1.26
how to find the smallest number of several variables and return the... 0.00
Split one row after every 3rd column and transport those 3 columns... +0.17
How to construct this binary variable in R? +1.11
Conditional merging tables 0.00
Sum of last order and average cost over all orders 0.00
Unsplit data.frame with condition in R -0.15
R: using apply.fromstart to calculate returns and standard deviation 0.00
How to write the remaining data frame in R after randomly subseting... +0.99
Dynamically modify values in data.table in R but getting only singl... 0.00
Count the number of ordered Items -0.47
how to find the longest same number in R -1.91
Insert colons into time stamp hhmmss +1.46
How to loop through dataset row and see if each row is continuous w... +0.60
Add rows to a data frame based on date in previous row 0.00
R monthly average from monthly time series data 0.00
Adding new variable to each element of a list of data.frames -0.34
How to subtract two vectors' elements one by one? -2.37
How to detect that a vector is subset of specific vector? -0.96
How to do exponential calculation with matrix? -1.00
How to match data from two tables with same primary key in R -1.81
Removing certain duplicate rows within a subset -0.28
Rcpp quantile implementation 0.00
Filling up a table in R -0.63
Creating vectors of temporary values created by unlist during vapply +2.36
R : calculation between columns -1.05
Use `data.table` to get first of subgroup based on a variable -1.28
Finding values in a vector that are between the values in a second... +0.49
Filtering rows by specific values %in% ONE OR MORE specified columns +0.91
Linear model and dplyr - a better solution? 0.00
Replacing NA's in R numeric vectors with values calculated from... +0.23
Cleaning column data in R -0.12
How can I use loops in R 0.00
How to create a string from row values in a dataframe ignoring NAs +0.58
Applying functions to a factor-dependant submatrix 0.00