pathToCircle: Convert generic path SVG node to a circle
In duncantl/SVGAnnotation: Tools for post-processing SVG plots created in R

Description Usage Arguments Value Author(s) See Also Examples

R's svg function, based on libcairo, draws circles using an SVG (cubic) Bezier path rather than the <circle> element. This function allows us to change such a node to the <circle> representation.

1	pathToCircle(path, box = getBoundingBox(path), force = FALSE, addTypes = TRUE)

`path`	the `<path>` node that is to be turned into a `<circle>` node.
`box`	the bounding box of the input/source node being converted. This should be of class Circle.
`force`	a logical value. If the input node does not correspond to a circle, this controls whether we force the conversion anyway.
`addTypes`	a logical value indicating whether to add a `type` attribute to the new node with a value of 'plot-point', making it easier to identify in subsequent computations.

The new node or the existing one if it is not suitable for change!

Duncan Temple Lang

svgPlot

doc = svgPlot(plot(1:10))
rr = getPlotRegionNodes(doc)
names(rr[[1]])

pathToCircle(rr[[1]][[1]])

names(rr[[1]])


as(getBoundingBox(rr[[1]]), "Circle")

pathToCircle(rr[[1]]) # silently leaves things unchanged
pathToCircle(rr[[1]], force = TRUE) # silently leaves things unchanged