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Computer Science > Symbolic Computation

arXiv:2210.03856 (cs)
[Submitted on 8 Oct 2022 (v1), last revised 17 Oct 2022 (this version, v2)]

Title:Disordered vectors in R: introducing the disordR package

Authors:Robin K. S. Hankin
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Abstract:Objects in the {\tt stl map} class of {\tt C++} associate a value to each of a set of keys. Accessing values or keys of such an object is problematic in the R programming language because the value-key pairs are not stored in a well-defined order. This document motivates and discusses the concept of "disordered vector" as implemented by the {\tt disordR} package which facilitates the handling of {\tt map} objects. Values and keys of a map are stored in an implementation-specific way so certain extraction and replacement operations should be forbidden. For example, if values are real, then the "first" value is implementation specific\ldots but the maximum value has a well-defined result. The {\tt disordR} package makes forbidden operations impossible while allowing transparent R idiom for permitted operations. An illustrative R session is given in which the package is used abstractly, without reference to any particular application, and then shows how it can be used to manipulate multivariate polynomials. The {\tt disordR} package is a dependency of {\tt clifford}, {\tt freealg}, {\tt hyper2}, {\tt mvp}, {\tt spray}, {\tt stokes}, and {\tt weyl}. The {\tt disordR} package is available on CRAN at \url{this https URL}.
Comments: 8 pages
Subjects: Symbolic Computation (cs.SC)
MSC classes: 68V99
ACM classes: I.1.m
Cite as: arXiv:2210.03856 [cs.SC]
  (or arXiv:2210.03856v2 [cs.SC] for this version)
  https://doi.org/10.48550/arXiv.2210.03856

Submission history

From: Robin Hankin Dr [view email]
[v1] Sat, 8 Oct 2022 00:14:02 UTC (47 KB)
[v2] Mon, 17 Oct 2022 00:21:31 UTC (47 KB)
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