title: 'RcppCNPy: Read-Write Support for NumPy Files in R' tags: - Python - NumPy - R - data transfer authors: - name: Dirk Eddelbuettel orcid: 0000-0001-6419-907X affiliation: Debian and R Projects - name: Wush Wu orcid: 0000-0001-5180-0567 affiliation: Institute of Electrical Engineering, National Taiwan University date: 26 August 2016 bibliography: paper.bib
Python is a widely-used and popular programming language. It is deployed in use cases ranging from simple scripting to larger-scale application development. Python is also popular for quantitative and scientific application due to the existence of extension modules such as NumPy (which is shorthand for Numeric Python) and many other packages for data analysis.
NumPy [@NumPy] is used to efficiently represent N-dimensional arrays, and provides an efficient binary storage model for these files. In practice, N is often equal to two, and matrices processed or generated in Python can be stored in this form. As NumPy is popular, many project utilize this file format.
R has no dedicated reading or writing functionality for these type of files. However, Carl Rogers has provided a small C++ library called cnpy [@CNPy]. Using the Rcpp modules feature in Rcpp [@Eddelbuettel:2013:Rcpp,@CRAN:Rcpp], we provide (some) features of this library to R via the RcppCNPy package [@CRAN:RcppCNPy].
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