StackRating

An Elo-based rating system for Stack Overflow
Home   |   About   |   Stats and Analysis   |   Get a Badge
Rating Stats for

David Arenburg

Rating
1732.38 (66th) 		Reputation
80,581 (1,024th)
Page: 1 ... 7 8 9 10 11 ... 33
Title Δ
Using Date/Time to Filter in R 0.00
Normalize each row of data.table in R +0.65
Relevel and reorder factors in R +1.00
r - count number of identical rows +0.24
R Find the frequency and duration a wave is above a given value usi... +0.98
Using adply in data.table +0.19
Cumulative sum that resets when 0 is encountered +1.29
R: Percentagewise interaction of variables by group +1.29
Removing text using R -0.70
Find index of change in a column +1.05
Count variable on a Variable R +1.25
To extract date, hour and weekday from a UTC timestamp -R -1.51
R Replacing NA values with the next value of another column value w... +0.90
R conditional grouping of rows and numbering of groups -1.04
How to identify rows within a certain boundary of a condition and c... 0.00
grouping multiple variables - R +1.08
Including information from overlapping intervals into data.frame +1.53
How to efficiently divide successor by predecessor in each column o... -1.14
Summarize Table based on a Threshold +0.36
Identify unique observations that satisfy two conditions and then r... +0.20
Creating a list in R from 2 vectors 0.00
Create a one column vector out of a data frame in r -0.72
R - Split data frame row into two rows +0.66
find the min in the vector but no 0 -0.51
Getting the number of occurances in a range R 0.00
Efficient way to cbind list by groups in data.table +0.87
allocate values to a new column based on logical string matching in... 0.00
Efficiently combine timestamped sensor data into events in R +0.20
Create New Data Frame with Column Names from Unique Values in anoth... +0.06
Insert new row based on condition +1.56
R split factor to m-columns with original length -0.08
Extracting multiple rows from a matrix depending on ID given by a v... +0.99
How to perform complex multicolumn match in R / -1.16
Assign value to group based on condition in column +0.88
Cumulative mean with conditionals -0.76
Calculate difftime between columns of different rows +0.87
Count logical values in subset of columns using .SDcols argument to... +0.24
Reshape data from long to wide with multiple explained variables -0.44
Count frequencies and add a total sum +0.20
R Grep help: match exact substring. RStudio on Mac OSX +1.54
Subset of data based on conditions 0.00
Adding values based on levels of a factor -2.24
dplyr - Get number of group_by to summarize +0.91
How to fill in all periods between two dates in MySQL? -1.40
filtering with multiple conditions on many columns using dplyr +0.37
Adding the values of second column based on date and time of first... +0.22
row numbers for explicit rows in r 0.00
convert vector to dataframe when vector's name is changing -0.28
R: Unique count by first occurrence of grouping variable +0.49
R How to calculate a proportion of some value by column and by row... +0.16