plot_manifest() returns a small, serializable fingerprint of a plot: a hash
of its input data (order- and column-sensitive), the data's shape and column
names, a structural hash of the spec, and the number of emitted elements. It
is what plot_svg() can embed (with manifest = TRUE) so a figure carries
its own provenance, and what plot_verify() recomputes to confirm a figure
still matches its data.
Arguments
- x
A PlotSpec.
Value
A named list: version, data (a hash/nrow/columns record),
spec_hash, n_elements, and fonts (the faces the plot resolved to, via
vellum::font_pin(), each a path/index/glyphs record). The fonts are
what lets plot_verify() tell a font-stack difference apart from a data
change — the same pixels are only guaranteed when the same fonts are
present.
Examples
plot_manifest(vplot(mtcars) |> mark_point(x = wt, y = mpg))$data$hash
#> [1] "33f1aa2876d0ad2a1232bcd25a9a350e"