Ricardo Saporta

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Ricardo Saporta has asked 74 questions and find answers to 317 problems.

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Ricardo Saporta questions

Logical vector as index in Python?
Speeding up a function: checking NA count before computing mean
Finding all matches in a vector in a data.table
faster alternative to object.size?
Regex \x96 -like characters
force Division by zero default to NaN instead of Inf
`setattr` on `levels` preserving unwanted duplicates (R data.table)
Modify auto_match of quotes, adding an additional quoting character to Sublime Text 2
regex for preserving case pattern, capitalization
Why do string commands via `R -e ..` on Mac vs Linux requires an extra escape?

Ricardo Saporta answers

Format custom summary output to match with ANOVA output in R
Multiple columns in R to conditionally modify other columns (not create a new column)
Get dummy (T/F) variables from list embedded within data frame
For loop with discrete values in R
Converting C# to idiomatic R
Paste column values together in a data frame
Given a list of n 4x4 matrices, how do I combine them such that they follow consecutively resulting in a 4nx4 matrix
Matching without replacement by id in R
Hierarchical data.frame to JSON with irregular nodes
modulus bug in R [duplicate]