flodel

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flodel has asked 47 questions and find answers to 449 problems.

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flodel questions

conditional inclusion of arguments in a function call
automatically detect date columns when reading a file into a data.frame
why does `x[0]` return a zero-length vector?
Why does `a ^ b` return a numeric when both `a` and `b` are integers?
preserve old (pre 3.1.0) type.convert behavior
setting environment variables programmatically
`as.na` function
Why are some of the logical operators so slow?
"replace" function examples
data.table "key indices" or "group counter"

flodel answers

How to make R script takes input from pipe and user given parameter
R - Connect Scripts via Pipes
merge data frames based on non-identical values in R
euclidean distance between vectors grouped by other variable in SPSS, R or Excel
How to source an R script that read stdin
Which numbers are present in a vector but not in another one [duplicate]
How to find elements common in at least 2 vectors?
merge multi-dimensional arrays
In R how to obtain a vector which would apply AND over all columns?
R: Shuffle array elements of selected dimensions