nicola

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nicola has asked 5 questions and find answers to 142 problems.

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nicola questions

R - C interface: extracting an object from an environment
Why data.table CJ doesn't respect column major order
Getting the leaf probabilities of a tree model in spark
Showing function arguments in order in an R shell

nicola answers

R data.table increment by category and set NA to last non-missing value
In the ompr package in R, how can I rephrase my objective/constraints/variables so as to avoid the "problem too large" error?
Sum values from select strsplit column in dataframe in R
Fill matrix from list based on column name match from other list
find last day of month in a sequence of dates
R sample N rows of a dataframe as evenly as possible across M clusters (but randomly within)
What is the difference between objects and variables?
How can I read float data from a binary file using R
Mean of list elements by position
Alternative to function findInterval