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JDG

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1498.52 (3,846,181st) 		Reputation
80 (818,065th)
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Title Δ
Performance properties of time-series operations in R at scale (mai... 0.00
How to calculate conditional average in data frame in R? -4.14
How to find the proportion based on count -1.75
update/join multiple columns on lookup table dynamically +0.09
How can I change row and column indexes of a dataframe in R? +3.97
Group rows of data frame and work on them +0.87
Mean value only of the data contained between the 1st and 3rd quart... -4.35
R loop to standardize variables using data.table +3.86
Average the periods 1-3 and 4-6 for each treatment and id for each... -1.21
How can I efficiently group several columns into one list column in... -4.63
Transforming a dataframe by "multiplying" a column's... +4.02
R: calculate absolute and relative difference between a set of vari... +4.12
How to find the interval between multiple dates in a single column... +3.64
How to calculate average of data fields of different stations separ... +3.99
How to identify the columns that contain non-time dependent variabl... -1.22
How do I generate tables simply and fast in R? +3.41
How can I rearrange the date from d-m-y to m-d-y in R? +4.25
R: Lag returns input -4.09
Identify Two-Way Combinations of Levels in a Column for Each ID +2.47
Search strings from dict within a data table column values 0.00
How to do a sumif/countif formula in R? +4.45
Merging multiple datasets and sort by id -1.74
How to use operators in subset function to drop records in R? -4.00
Populating NAs and correcting data based on sequence within a seque... -3.74
Creating several new columns in a data frame using the same function 0.00
Matching the values in the list between two data sets +0.98
Creating new column according to the position of other column in R 0.00
Conditional aggregation in R 0.00
How to create a dataframe with rows of open and close as columns 0.00
R group by one column and apply custom function to another column -3.20
How to take the mean in a dataframe by quarters? 0.00
R dataframe aggregate conditionally based on column value, per quar... 0.00
R computing ratios from multiple related variables in one piece of... 0.00
Display means (or # observations) by two variables 0.00
Removing duplicate elements within a category in R +0.50
How to get the variable names assigned to another variable? 0.00
Getting Next Record between two dataframes in R 0.00
operating between columns and classifing values per groups R 0.00
Matching words with more than two number of words in different data... 0.00
How to give my RStudio server "sudo" access? 0.00
Identify duplicates (two columns), sum it based on another column,... 0.00
skipping error "undefined columns selected" in lapply 0.00
What's the best way to reshape this data into wide format? 0.00
Assigning value to dataframe in R - for loop speed +0.24
R: Using contains function while filtering -2.30
how to find minimum values across different dates in r -3.54
How to insert NA values in a ts object to fill the gap with another... -0.09
create a new column with values linked to a level of a variable 0.00
Keep values from a list based on the first timestamp record +3.96
Is there an R function for grouping the data by one variable (colum... -4.34