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 …
2018-10 Building an mplib Shared Library
This report records the steps that were used to build a shared library for the MetaPost graphics system. Paul Murrell Download
2018-09 Importing General-Purpose Graphics in R
This report discusses some problems that can arise when attempting to import PostScript images into R, when the PostScript image contains coordinate transformations that skew …
2018-08 Revisiting Mathematical Equations in R: The ‘dvir’ package
This report describes an R package called ‘dvir’ that aims to use TeX as a layout engine, but performs all rendering within R. The package …
2018-07 Echoes of the Future
This report discusses ways to combine graphics output from the ‘graphics’ package and the ‘grid’ package in R and introduces a new function echoGrob in …