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G. Grothendieck

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1622.82 (1,021st) 		Reputation
165,339 (319th)
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Title Δ
How do I fill in Dates in ts() function, when there is missing data... 0.00
How to concatenate items of a string maintaining the (" ") -0.37
How to grep a string vector in another string vector in R +2.00
Extracting the pattern using regexpr() and regmatches() 0.00
convert csv file to time series format +1.28
How to read csv with double strings inside 0.00
How can I use rollapply with a 5 month window? +0.27
how do you round time to the next hour in R -1.95
Rolling average for panel data (with a few details) +1.08
Run While Loop on Column of SQL Queries (Needs to be done using sql... 0.00
nls: Comparing complete model versus a null model 0.00
How to create index for custom aggregation on zoo object +0.88
Replace String Pattern in sqldf 0.00
How to get sum of column from sqldf output in R? -2.40
How do I return multiple columns without consider Na values and gro... +0.75
Extract root of dummy variable in model fit summary 0.00
How to compare and join two dataframes based on the list in another... 0.00
Regex for moving all instances of a substring to the beginning -0.17
How to convert daily values into monthly for R -0.57
Can I abbreviate df[ !is.na(df$val) & df$val > 15]? 0.00
Conditional accumulating sum with a dynamic condition -1.04
Is there a regex to find a string between two forward slashes and a... -1.44
How to find out how many trading days in each month in R? -1.04
count number of values in one column if the value in another column... -0.70
How to format a time in R +0.80
How do I check if a date is between two values in R? +0.33
How to do use `replace` properly in complex cases? 0.00
Rolling Granger Causality Test 0.00
R- Get a list of output value from a formula -0.46
Aggregate frequency classification table +1.04
Subtract rows varying one column but keeping others fixed -0.14
extract array from array +0.17
How do I implement a sliding/lagging window? -1.49
How can I replace all day values in a date with a specific value? +1.04
Playing with R environments +0.30
How can I sum vectors nested in a column of a data frame? +0.60
Smoothing irregular frequency data in R 0.00
How do I avoid the "some methods for “zoo” objects do not work... 0.00
New matrix containing specific data +0.61
Get 2nd and 4th Saturday of Month -1.27
I would like to extract the time from a character vector +0.12
Historical stock prices download in R 0.00
Calculate income and wealth shares in R +1.20
What's the semantics of rowSums(X %*% C * X) -1.96
Rearranging variables using dplyr's select and everything() +1.52
How to get match.call() from a united function? -2.94
nls failing on some subsets of data, but not on other, similar, sub... 0.00
zoo: missing values in 'row.names' are not allowed +1.17
How can I handle whitespace when using `deparse(substitute))` (or a... -1.85
Removing vectors containing only zero in a list of lists of numeric... -0.87