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Rating Stats for

Arun

Rating
1646.88 (617th)

Reputation
97,405 (767th)

Page: 1 ... 7 8 9 10 11 ... 26

Title	Δ
dplyr: function of rows	-2.25
How to apply a set of functions to each group of a grouping variabl...	+0.32
X-axis configuration in a plot with data.table	-0.21
data.table binary search fails if j refers to a numeric (extra) key...	0.00
R - efficient way to apply function to each row of a data frame and...	-1.53
data.table aggregating over a subset of keys and joining with the s...	+1.24
Split a string into combinations of 2 characters and expand into da...	-0.33
How to convert a list of lists to a dataframe - non-identical lists	+0.58
Removing multiple columns from R data.table with parameter for colu...	0.00
How to select the maximum value in each group in R	-0.68
Efficiently checking value of other row in data.table	-2.21
Efficiently checking value of other row in data.table	+0.79
How to pass fun.aggregate as argument to dcast.data.table?	0.00
Lagging in a data.table in R which is time series panel data	0.00
how to programatically assign a bunch of variables within a data fr...	-0.95
Identify value with its matched control	+0.24
roll join with start/end window	+0.67
roll join with start/end window	-0.75
splitting a column by factor within a data frame	-1.07
Understanding data.table invalid .selfref warning	0.00
Efficiently building a large (200 MM line) dataframe	+0.88
can dplyr package be used for conditional mutating?	-1.08
R: Recursive *ply/plyr function; for loop replacement	-0.21
R - Transforming data in dataframe from one time scale to another	-0.21
how to alternatively concatenate 3 strings	-0.07
melt.data.table may crash when measure.vars contains variables not...	0.00
Subsetting and assignment on several columns of a data table	+2.24
Conditional calculation of means of different columns in data.table...	+0.30
matrix operations and component-wise addition using data.table	+1.18
Undocumented error in dcast.data.table	0.00
data.table result of by and join not sorted as I expected, why? Is...	0.00
Numeric comparison during merge in R	+1.19
R data.table: calculating grouped frequencies	0.00
unique.data.table do not handle keys properly	-0.20
Direct update (replace) of sparse data frame is slow and inefficient	0.00
Why does expand.grid ignore options?	+1.39
integer overflow with rollmean in zoo	0.00
Subtraction within Groups using R	-2.62
collapse rows in data.table	0.00
Using := in data.table with subset for i and a vector for update	0.00
Divide one column of a data.table by an integer depending on anothe...	+0.74
Read and R.bind multiple csv files	-1.03
Creating multiple dataframes simulataneously based on different val...	-0.47
Transactions reshaping from long to wide, joining Buy and Sell data...	-0.51
Is there a %in% operator accros multiple columns	-0.93
Conditionally calling a specific column in R	-0.21
Default argument in R function (formal argument matched by multiple...	+0.23
Retrieve only top % of sub group in a data.frame	+0.45
Calculating count and proportion of a certain value for a number of...	0.00
Is data really copied four times in R's replacement functions?	0.00