Changelog

Source: NEWS.md

ggmemo 0.1.0

Initial release. ggmemo adds two functions for annotating ggplot2 business charts without manual coordinate math.

New features

• 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().

Known limitations

• 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).