Set sensible Knitr defaults for chart snapshots — taxplore_configure

Sets default chunk options that work well both with HTML documents and other formats such as PDF. Caution: The default image format and resolution are set for all chunks, not just those containing Krona charts.

Usage

taxplore_configure_snapshot(dpi = 300, dev = "png", screenshot.delay = 0.05)

Arguments

screenshot.delay: Time (in s) to wait before taking a screenshot of a HTML widget (such as the Krona charts from this package, but not exclusively). The default of 0.05s differs from the default 0.2s used by Knitr. To be precise, the Krona charts need no delay at all. In case of problems with other widgets, a longer delay may be set.
document.dpi: Resolution of images in static non-HTML (e.g. PDF) documents
document.dev: Snapshot format for non-HTML documents. The default is to generate PNG images, as embedding them as vector graphics may currently not result in the correct dimensions due to a problem with Webshot2.

Details

In static documents, this function simply does calls:

knitr::opts_chunk$set(dpi = document.dpi, dev = document.dev, screenshot.opts = list(delay = screenshot.delay))