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hadley

Rating
1599.50 (1,799th)
Reputation
83,303 (974th)
Page: 1 2 3 4 5 6 ... 12
Title Δ
Merge rows within a dataframe by a key -2.48
Parse a string with (dots) arguments 0.00
R: How to make transformations on subset of a subset fast (optimize... -2.46
Eliminate groups which have different values in R +1.54
A C++ version of the %in% operator in R -0.48
Group by multiple columns in dplyr, using string vector input +1.27
Turning an integer string date into an actual date +0.22
data.table and error handling using try statement -1.67
pass function to ddply wrapped inside a function as part of that fu... +1.91
Need faster rolling apply function with start to stop indices -0.13
How to force dispatch to an internal generic in R? 0.00
Parse URLencoded GET string in R into a list -0.16
Counting column data in a matrix with resets -1.46
In R, can I make the table() function return the number of NA value... -1.97
How to convert from ellipsis to list and back to a raw call in R wi... +1.47
How do I correctly close a connection in R, so its connection 'slot... 0.00
grep pattern out from lines e.g. grep("Oh|oh", word, valu... -0.53
"Ops" group generic method and match.call for delayed eva... 0.00
Avoiding eval(parse()) in building fractional polynomial function 0.00
Understanding how .Internal C functions are handled in R -0.63
Is there a better solution than a for loop when you have to keep tr... -1.31
Optimizing a "set in a string list" to a "set as a m... +0.32
How do I convert date to number of days in R +0.93
Assign attributes with C++ to an arbitrary R object? +0.29
Efficient use of functions on long data.frames in R -2.24
Selecting cases by ordinal variables in a dataframe in R +0.71
R CMD INSTALL --build package --> "vignettes missing" 0.00
How to evaluate arguments of a function call inside other function... +0.38
Code organisation in R package development -1.92
How do I indicate collate order in Roxygen2? 0.00
R seems to ignore the last line of .Rprofile? 0.00
Same memory usage of matrix with different size +0.34
Set layers in ggplot2 via loop 0.00
Safely evaluating arithmetic expressions in R? 0.00
List all combinations of factors (interactions) with no observation... -1.64
Unboxing List of lists as Data Frame columns elegantly -1.96
R How to call '[.class<-' directly 0.00
How to call on.exit() from parent? 0.00
Operator overloading in R reference classes 0.00
Evaluating ddply within a function when passed ggplot2 aesthetic ma... 0.00
Behavior of do.call() in the presence of arguments without defaults +1.78
Create and Call Linear Models from List -0.21
Speeding up searching for indices within a Large R Data Frame +0.84
How can I turn the filename into a variable when reading multiple c... -1.84
Accessing fitted.values when using ddply -2.62
How to get an environment as a variable? 0.00
Fast way to figure out if a number is inside a vector in R -1.85
R: Split-Apply-Combine... Apply Functions via Aggregate to Row-Boun... 0.00
Order dataframe chronologically based on dates which are formatted... -0.98
Converting a \u escaped Unicode string to ASCII +0.80