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2020-04 Catching up with R Graphics

July 14, 2020pmur002

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

June 8, 2020pmur002

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’

April 16, 2020April 16, 2020pmur002

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

January 6, 2020pmur002

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

November 25, 2019pmur002

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’

March 4, 2019March 6, 2019pmur002

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

December 17, 2018pmur002

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

December 3, 2018pmur002

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

November 2, 2018pmur002

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

October 4, 2018pmur002

This report records the steps that were used to build a shared library for the MetaPost graphics system. Paul Murrell Download

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