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Rating Stats for

David Arenburg

Rating
1732.38 (66th) 		Reputation
80,581 (1,024th)
Page: 1 ... 19 20 21 22 23 ... 33
Title Δ
Dividing columns by group (Grouping in data frame) -0.12
R text mining - intersection between text fields +1.61
Assign results of apply to multiple columns of data frame +0.28
see if there is a match in the characters in one column and perform... -1.10
How many samples of two classes can be drawn from this population o... +0.34
Switch statement matching any of a set of cases +1.47
Matrix of common character features using vectors in R -0.19
expand.grid with separate variable for each column +0.89
How to replace only the spaces between numbers with dots -1.69
copy one vector to another, omitting NA values +0.87
Combine two fitting string columns to one in R +0.00
count a character object by row in a large data frame +0.33
In R, convert data frame diagonals to rows 0.00
R: subsetting dataframe using elements from a vector +1.41
Loop over a data.table rows with condition 0.00
count occurences in unique group combination +1.49
R - setting equiprobability over a specific variable when sampling 0.00
R new column summarizing count of groups of columns +2.42
How to plot deviation from mean -1.18
Convert List to Vectors in R (1st vector comprises of 1st element o... +1.94
Find the indices of last occurrence of the unique elements in a vec... +0.18
how to show duplicates by group using data.table in R 0.00
add partial cum sum column to data frame +0.70
Summarizing an arbitrary # of columns in a data frame using my own... -0.67
How to count and flag unique values in r dataframe +0.93
R: Using the sort function in a dataframe based on multiple columns +1.56
Getting the top values by group using dplyr +0.52
R and lubridate: do the intervals in x fit into any of the interval... 0.00
Correct previous year by id within R +0.94
data.table - split multiple columns +1.97
R incorrect value of date function 0.00
R: RegEx for coordinates +0.95
More effective merging of matched column with duplicates in data.ta... +0.98
Subset by row number within magrittr chain -1.80
For each line of a Data.Frame, get the column name where a value is... +1.70
R: create vector from data frame when needed colls saved in this da... -0.47
Calculate relative frequency for a certain group 0.00
Concatenate char vector with | separator +0.31
Divide every row of a matrix, by the first entry of that very row +0.33
Add each column with last value of last column of the row in datafr... -1.71
empirical t-values with bootsempls in R, transform console output t... 0.00
Calculation on multiple columns and aggregate values by multiple fa... -1.24
Adding column or row in 3D array -0.18
Converting Factor Levels to Numbers -0.79
R - graph frequency of observations over time with small value range +0.19
How to use base::rowSums() with dplyr/magrittr pipe (%>%) 0.00
summarise by group of columns using min and maintaing row number -0.76
Function using ifelse not returning a vector in R -1.11
filter rows in a text file based on rows of another file in R or py... -0.17
Remove duplicates with old dates -2.14