flodel

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flodel has asked 48 questions and find answers to 479 problems.

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flodel questions

unconditional warnings when recycling
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

flodel answers

random forests: Does it make any difference if the test-set is also labeled?
Creating new variables describing the existing index position of a specific value
Convert dataframe to 3D array
Row-wise correlations in R
Sum values of combinations within a group
How to get the difference in value between subsequent observations (country-years)?
Pivoting a CSV file using R
combination with missing or mismathes in r
Match does not work
R: Is there a simple and efficient way to get back the list of building block matrices of a block-diagonal matrix?