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 program to solve...
View Article2018-13 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’, but that package requires a “backend” package to perform...
View Article2019-01 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 a geometry engine interface for...
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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’ package, integrating the imported image with other R graphics,...
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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 code is producing the correct...
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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 ability to draw typeset text in R with a wider variety of...
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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 and to maintainers of R packages that...
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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 Murrell Download
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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 of TikZ drawing capabilities within R graphics. Paul Murrell Download
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2020-06 Letting Go of Type 1 Fonts
The ‘dvir’ package for R is limited in that it is only known to work on an (Ubuntu) Linux distribution with (at least) a full TeX installation. Unfortunately, not even that is true for recent stable...
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2021-01 Accessing ‘grid’ from ‘ggplot2’
This report describes the ‘gggrid’ package, which provides a convenient interface for making use of raw ‘grid’ functions in combination with ‘ggplot2’. The ‘gggrid’ package provides two functions,...
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2021-02 Groups, Compositing Operators, and Affine Transformations in R Graphics
This document describes an expansion of the R graphics engine to support a number of new graphical features: isolated groups, compositing operators, and affine transformations. For example, the image...
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2021-03 Stroking and Filling Paths in R Graphics
This document describes an expansion of the R graphics engine to support stroking and filling paths. Paul Murrell Download
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2021-04 Luminance Masks in R Graphics
This document describes an extension of the support for masks in R graphics to allow luminance masks as well as alpha masks. Paul Murrell Download
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2022-01 Vectorised Pattern Fills in R Graphics
This document describes an extension of the support for pattern fills in R graphics (linear gradients, radial gradients, and tiling patterns) to allow multiple pattern fills to be specified at once...
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2022-02 Constructive Geometry for Complex Grobs
This document describes developments in the grobCoords() function in the R package ‘grid’, plus improvements to the ‘gridGeometry’ package that makes use of the grobCoords() function. Paul Murrell...
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2022-03 Offsetting Lines and Polygons in ‘grid’
This document describes new functions in the ‘gridGeometry’ package for R that generate offset regions and Minkowski Sums for lines and polygons. Jack Wong and Paul Murrell Download
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2022-04 Constructive Solid Geometry and Function Representation in R
The HyperFun Project provides a language and interpreter for describing 3D scenes using Function Representation and Constructive Solid Geometry. This document describes the R package ‘hyperfun’, which...
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2023-01 Rendering Typeset Glyphs in R Graphics
This document describes a new feature in the R graphics engine to support rendering typeset glyphs. This provides a basis for developing improved text rendering in R graphics. Paul Murrell, Thomas Lin...
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2023-02 Porter-Duff Compositing Operators in R Graphics
This document describes an upate to the behaviour of Porter-Duff compositing operators in R graphics. Paul Murrell, Thomas Lin Pedersen, and Panagiotis Skintzos. Download
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