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G. Grothendieck

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1622.82 (1,021st) 		Reputation
165,339 (319th)
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Title Δ
Rollapply breaks and start again in R? -2.35
Optimization issue, Nonlinear: automatic analytical jacobian / Hess... -0.01
Connecting to local MySQL server with RMySQL 0.00
R Package development: overriding a function from one package with... +0.31
How to interpolate zeros in a time series data in R 0.00
Format Date (Year-Month) in R -0.40
Subtraction based on two factors 0.00
R - aggregate data for 1 column by another column, based on statist... +0.08
Create indicator -2.03
symbolic matrix multiplication by Ryacas 0.00
Separate word from number in R +0.56
Converting R time column to specific strings -0.32
Listing explicitly defined methods only (Reference Classes) -0.02
Read a text file with tab and semicolon in R -0.56
Not able to replace SQLite table with RSQLite/DBI package 0.00
Unable to run R script containing gWidgets2 in command prompt 0.00
dplyr: How to use group_by inside a function? +1.65
Extracting everything between two symbols in a string +1.83
How to use some apply function to solve what requires two for-loops... -1.06
Plot multiple time series with different time indices in R using xts +0.34
Extract data between two pattern occurrences 0.00
Parsing strings into data frames 0.00
nonlinear optimizaion in R +0.44
Importing Excel file using url using read.xls +0.35
can I switch the grouping variable in a single dplyr statement? 0.00
How to use dyn package to perform regression on xts object? 0.00
Capturing a repeating group +1.62
Better way to conditionally fill a column in one df based on multip... +1.35
how do you calculate the difference between the same months in dife... +0.11
Finding unique pairs in a character vector in R +0.79
R: splitting a string between two characters using strsplit() 0.00
How to remove only "actual numbers" from a string of char... +0.94
Using grepl & which to validate accurate string split with time... -0.36
cumsum starting over after NA +0.36
By-function in R -0.13
How to transform character vector to regular expression for datafra... -1.56
Making an implicit data value explicit in R 0.00
Plot Frequency from Categorical Data over Irregular Intervals in R 0.00
How should I transform a table of stacked stock data to a panel dat... -2.04
Joining Lists in R +1.98
Why S3method dispatch gets slower? S3 dispatch vs manual do.call be... 0.00
load time series from csv 0.00
I need a script in r for fit curve this data? +0.36
Extracting last date of the year from a date object -1.72
Fast minimum distance (interval) between elements of 2 logical vect... -1.50
R: Scoping rules are getting me into murky waters -0.15
Minimum distance between elements in two logical vectors 0.00
Find month from week numbers using lubridate 0.00
R: Loop pairs of columns in a dataframe -1.39
How to use dplyr for programming 0.00