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Initial release. ggmemo adds two functions for annotating ggplot2 business charts without manual coordinate math.
annotate_callout() points at a specific data row
with an arrow and label. Supports four label positions, automatic or
explicit nudge, and ... pass-through for styling.
annotate_change() draws a color-coded arrow between
two data rows and labels the midpoint with the computed delta. Supports
four format options: "percent" (default),
"absolute", "points" (percentage points), and
"both". Custom colors via the colors argument;
label styling via ....
Both functions use tidy evaluation for row selection
(where, from, to) — the same
syntax as dplyr::filter().
The automatic nudge heuristic in annotate_callout()
guesses which columns are x and y from the data frame structure. On wide
data frames with many numeric columns, use the nudge
argument or pass a two-column subset of the data.
annotate_change() similarly guesses the x-axis
column. The heuristic prefers Date > numeric/factor > character,
but can pick wrong on wide data.
Both limitations are tracked for v0.2 (#1, #2).
These binaries (installable software) and packages are in development.
They may not be fully stable and should be used with caution. We make no claims about them.
Health stats visible at Monitor.