2020-05 Adding TikZ support to ‘dvir’
This report describes an update to the R package ‘dvir’ to add support for the TikZ graphics package. This allows R users to make use …
2020-04 Catching up with R Graphics
This document describes an expansion of the R graphics engine to support a number of new graphical features: gradients, patterns, masks, and clipping paths. Paul …
2020-03 Improved Clipping in the R Graphics Engine
This report describes improvements to clipping in the R graphics engine. These changes will be of particular interest to maintainers of R graphics device packages …
2020-02 The Agony and the Ecstacy: Adding LuaTeX support to ‘dvir’
This report describes an update to the R package ‘dvir’ to add support for the LuaTeX engine. The immediate advantage of this support is the …
2020-01 Visual Testing for Graphics in R
This report describes the ‘gdiff’ package for R, which provides tools for performing visual tests on graphical output. Visual testing is essential for checking that …
2019-02 SVG In, SVG Out
This report discusses how to work with complex SVG images in R. We look at importing an external SVG image into R with the ‘grImport2’ …
2019-01 A Geometry Engine Interface for ‘grid’
This report describes a new function in ‘grid’ called grobCoords and a new package called ‘gridGeometry’ that combines grobCoords with the ‘polyclip’ package to provide …
2018-13 Rendering HTML Content in R Graphics
This report describes several R packages that allow HTML content to be rendered as part of an R plot. The core package is called ‘layoutEngine’, …
2018-12 MetaPost Three Ways
This report describes three different approaches to communicating between R and MetaPost: importing the PostScript output from MetaPost with the ‘grImport’ package; calling the mpost …
2018-11 Variable-Width Bezier Splines in R
This report describes support for a new type of variable-width line in the ‘vwline’ package for R that is based on Bezier curves. There is …