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G. Grothendieck

Rating
1622.82 (1,021st)
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165,339 (319th)
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Title Δ
R package sqldf sum over multiple columns 0.00
Weight any set of numbers to sum to zero in R -1.37
how can I use rollapply with scale 0.00
Solving equation solution in R 0.00
overlapping groups in dplyr 0.00
Is it possible to reference other var in `transform`? +2.30
is there an equivalent to Stata's egen function in R? 0.00
Split string in R -0.16
Find frequencies of combinations where the data.frame needs to be p... +0.76
bquote: How to include an expression saved as a string object? +1.49
Split numeric vector into unequal sections, then apply a custom fun... -2.53
Split a string vector with ' [ ] ' in R -0.38
Loading High Frequency Data in R -2.66
How do I turn the rows of my data.frame into columns? +0.39
R -- Expand date range into panel data by group +1.50
Rolling Standard Deviation in a Matrix in R +2.10
Date manipulations using as.POSIXlt -0.97
Pass a comma separated string as a list -0.35
Is this reshape of data possible? -0.61
Matching regular expressions with R 0.00
Search for subheader text and subset a range of time series data 0.00
Defining functions (in rollapply) using lines of a dataframe -2.16
How to return monthly minimum values for each year that are least 1... +0.44
Replace value using previous row depending on condition (using a fu... 0.00
converting a data frame (panel data) to zoo 0.00
Newb regex help: string with ampersand, using R -1.58
How do I subset every day except the last five days of zoo data? -0.16
Read columns of a csv file using shell or pipe inside R - Windows -0.15
split strings on first and last commas +0.62
Creating call objects to compare to formula elements +0.34
Is there a way to shorten a series of colClasses -0.11
how to encode url on R -2.08
Calculating elapsed time in R given one column 0.00
Using R to download zipped data file, extract, and import .csv -0.14
Set a functions environment to that of the calling environment (par... +0.68
Reuse an object created in a function in R -0.54
R - How to use apply instead of for loop in regex matches -0.16
equivalent of 'which' function in Rcpp -1.02
Where clause for categorical variable in R using RSQLite 0.00
Solving a mixed system of equality and inequality +0.68
Can't use sqldf on my data frame anymore (Error in sqliteExecStatem... 0.00
Compute bi-monthly overlap fraction -0.02
Extract subsets of a data frame in R based on a proportion of the t... 0.00
Moore-Penrose generalized inverse of a large sparse matrix 0.00
Intersecting multiple columns between two data frames +0.03
Carry Last Observation Forward by ID in R 0.00
Plot many time series variables in R -2.45
Need to vectorize function that using loop (replace NA rows with va... +1.34
creating new variables with transform and %>% -0.16
Subsetting data using regular expressions in R +1.55