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
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Articles by pmur002
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
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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. ...
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 ...
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 ...
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 ...
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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’, ...
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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 ...
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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 ...
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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 ...
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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 ...
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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 ... [Read more...]
2018-06 Rasterizing Chromatograms
This report describes an application of the ‘rasterize’ package for R. We rasterize (just) the line segments of two chromatograms in order to render one ... [Read more...]
2018-05 Selective Raster Graphics
This report explores ways to render specific components of an R plot in raster format, when the overall format of the plot is vector. For ... [Read more...]
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