What does Rcpp do?
Rcpp provides a clean, approachable API that lets you write high-performance code, insulated from R’s arcane C API. Typical bottlenecks that C++ can address include: Loops that can’t be easily vectorised because subsequent iterations depend on previous ones.
What is SEXP RCPP?
A SEXP is a pointer to an encapsulated structure that holds the object’s type, value, and other attributes used by the R interpreter. The R application programming interface (API) provides a limited set of macros and C routines for manipu- lating SEXPs and calling R functions.
What is package RCPP?
The ‘Rcpp’ package provides R functions as well as C++ classes which offer a seamless integration of R and C++. Many R data types and objects can be mapped back and forth to C++ equivalents which facilitates both writing of new code as well as easier integration of third-party libraries.
How do I run C++ in R studio?
RStudio uses “Rcpp attributes” as its default method for making C++ source code available to R when a new source file is added via the RStudio menu “File > New File > C++ File”.
What is the c () in R?
The c() is a built-in R generic function that combines its arguments. The c() in R is used to create a vector with explicitly providing values. The default method combines its arguments to form a vector. All arguments are coerced to a common type of the returned value, and all attributes except names are removed.
What is a SEXP?
An SEXP, or s-expression, is a data format for representing a ordered tree of typed values. The s stands for symbolic.
What is retort technology?
Retort is a processing method that uses heat and pressure to sterilize food. It is one of the most commonly used methods of thermal food processing and is popular with food producers across the world. The process to pack food. in a retort pouch follows.
How is retorting done in bottling?
The retort sterilization process involves first filling the pouch and then exposing the sealed package to ultra-high heat. The thin packaging quickly transmits heat, permitting content sterilization to occur up to 40% faster than with jars and cans.
What is package RCPP in R?
How do you make an R script executable?
- Use .R as the file extension to make it clear that its a shell script.
- Run chmod +x filename.R to make the file executable. This allows you to run the script using ./code/filename.R.