2x2, 3x3 and Nxn Space-Filling Curves R package sfcurve version 1.0.1 Implementation of all possible forms of 2x2 and 3x3 space-filling curves, i.e., the generalized forms of the Hilbert curve <https://en.wikipedia.org/wiki/Hilbert_curve>, the Peano curve <https://en.wikipedia.org/wiki/Peano_curve> and the Peano curve in the meander type (Figure 5 in <https://eudml.org/doc/141086>). It can generates nxn curves expanded from any specific level-1 units. It also implements the H-curve and the three-dimensional Hilbert curve. See <doi:10.48550/arXiv.2412.16962> for more details. Software Depends: R (>= 4.1.0) Imports: grid, Rcpp, methods, colorRamp2 LinkingTo: Rcpp Suggests: rmarkdown, knitr, rgl, testthat, ComplexHeatmap, igraph, digest Zuguang Gu <guzuguang@suat-sz.edu.cn> Comprehensive R Archive Network (CRAN) Zuguang Gu [aut, cre] (ORCID: <https://orcid.org/0000-0002-7395-8709>) MIT + file LICENSE (https://CRAN.R-project.org/package=sfcurve/LICENSE) 2026-04-10 application/tgz https://CRAN.R-project.org/package=sfcurve doi:10.32614/CRAN.package.sfcurve