ricardo

ricardo has asked 22 questions and find answers to 10 problems.

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About

I enjoy programming for work and as a pass-time; I mostly use R and Cpp (via Rcpp).

ricardo questions

combining head and tail methods in R
efficiently move environment from inside function to global environment
scale columns of an xts object
remove text after final period in string
Vectorise find closest date function
What makes rollmean faster than rollapply (code-wise)?
Compiling *.Rnw files with knitr --without Rstudio
Get characters before first space
Is there a _fast_ way to run a rolling regression inside data.table?
Why is dplyr so slow?

ricardo answers

time series plot with x axis in "year"-"month" in R
Within C++ functions, how are Rcpp objects passed to other functions (by reference or by copy)?
Applying a function row-wise for a dataset
Looping over a specific subset of column names in R
Applying a function to every combination of elements in a vector
Referencing Row Number in R
How to fix Python Numpy/Pandas installation?
How can I load an object into a variable name that I specify from an R data file?