(plot-heatmap field 'mode 'half)Macros takes what made Emacs worth learning — an editor written in its own extension language, customizable to the core — and rebuilds it on Steel, a fast embedded Scheme, with a GPU renderer underneath. Magit, evil, helix, org-mode, LSP, a debugger, and a terminal ship in the box.
v0.4.9 · macOS · Windows · Linux · free & open source
A whole editor · not a plugin host
Steel Scheme you can evaluate in place, a Magit-style git porcelain, Org mode, and language servers for everything else. Every buffer below runs on the same Scheme you write your config in, so any of it can be rewritten while it runs.
New in Macros · scheme/plot.scm
Charts drawn from braille dots and block glyphs, colored with faces. Because a chart is just text, it works anywhere text does: a dashboard row, an Org file, the REPL, or a buffer of its own. Everything below is rendered from data on this page, the same way.
(1 3 2 5 8 6) ▁▃▂▅█▆ cpu █▇▆▆▆▆▅▄▃▃▁▁▁▁▂▂▃▃▃▃▄▄▄▄▄▅▆▆▇▇▆▇ mem ▅▅▅▅▄▄▄▅▅▆▇██▇▇▇▇▇██▇▇▆▅▄▃▃▃▂▂▁▁ net ▇▇▇▇▇███▇▇▅▅▄▂▂▃▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁ gc █▇▆▄▂▁▁▁▁▁▂▂▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁▁
Eight block heights that fit in a mode line, a dashboard row, or a sentence.
(plot-sparkline (list 1 3 2 5 8 6))rust ████████████████████████ 48.2k scheme ███████▋ 15.3k tsx ███ 6.1k md ██ 3.9k toml ▋ 1.2k
Labeled bars with eighth-block tips, so small differences still show.
(plot-bars langs 'width 24)80 ┤ ⢀⡀ │ ⡠⠊⠸⡀ ⡰⡄ ⢀ │ ⢠⠓⠒⠒⠁ ⢣ ⣤ ⣀ ⢀⡰⠁⠱⣀ ⣀⠔⠊⠁ │⠔⠁ ⢣ ⢀⠎ ⠓⠁⠉⢒⡪⠤⠤⣀⣀⣑⠴⣤⠤⠒⠒⠉⠉ 50 ┤ ⢀⣀⠔⠫⡉⡾⣀⠤⠤⠔⠊⠁ ⠈⡆⢀⠤⡄ │⠉⠒⠤⠤⠤⠤⠒⠁ ⠈ ⠘⠊ ⠘⢄⠤⢄⢄ │ ⠈⢆ 20 ┤ └──────────────────────────────────── ■ cpu ■ mem
Braille dots give 2 × 4 sub-cell resolution. Two series, one shared axis.
(plot-lines load 'width 36 'height 8)100 ┤ ⢀ ⠂ ⠠ │ ⡀ ⡀⠈ ⡂ ⡘⡀⠐ │ ⢀⡀⠈ ⢀⠊⠄ ⠠⠐⠦ ⠊ ⠈ ⠆ │ ⠠ ⠁ ⡀ ⠄⡀⠂ ⠂ ⠠⠂ ⢈ ⠁ ⢀ ⡀ ⡀ ⡄ 50 ┤ ⡀ ⠤ ⠘⠈⠁ ⢀⠁⠄⠁⠠⣀⢠⡄⠂ ⣀⢰⠐⠔⠂⠃ ⠉⠉⠂ │⠂ ⠈ ⢀ ⠁⠠ ⡀⢤⠁⠈⡀ ⠠⠠⠊⠁⠓ ⠃ │⠈ ⠁⠁⠘⠂ ⠁ 0 ┤ └──────────────────────────────────── ■ fast ■ slow
Points, not lines. Where two series share a cell, the later one wins the color.
(plot-scatter runs 'width 36 'height 8)250 ┤ │ ▇▇ │ ▂▂ ▇▇ ██ ▄▄ 125 ┤ ██ ██ ██ ██ ▁▁ │▂▂ ██ ██ ██ ██ ██ 0 ┤██ ██ ██ ██ ██ ██ ██ ▇▇ ▄▄ ▁▁ ▁▁ └──────────────────────────────────── 18ms 59 101ms
Bin a list of numbers and draw the counts. Axes round out to whole tick steps.
(plot-histogram latencies 'bins 12 'height 6)⡠⠔⠢⢄ ⡔⠁ ⠣⡀ ⢀⠎ ⠑⡄ ⢀⠎ ⠘⡄ ⢀⠎ ⠘⡄ ⢀⠎ ⠘⡄ ⡠⠊ ⠘⢄ ⣀⠔⠁ ⠣⣀ ⣀⣀⣀⣠⣤⣴⣾⣿ ⣿⣷⣦⣤⣄⣀⣀⣀ ──────────────────────────────────── -1.96σ 0 +1.96σ ■ 5.0% in the tails
Plot any function; shade ranges under the curve and get their probability.
(plot-normal 0 1 'shade (list (list -3.5 -1.96) (list 1.96 3.5)))▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ ▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀▀ 00h 08h 16h 24h ████████ low → high
Half-block mode packs two data rows into every line with ▀ foreground and background.
(plot-heatmap activity 'mode 'half)If you've used Emacs
Commands, keymaps, modes, the mode line — every layer is Scheme you can read, redefine, and re-eval while the editor runs.
Vim-style evil or selection-first helix, with counts, operators, text objects and dot-repeat. Or stay in Emacs keys.
Stage hunks, commit, branch, and read diffs in a buffer, powered by gitoxide underneath.
Headings, TODOs, agenda, capture, tables, and babel. A real org-mode, written in Scheme.
Definitions, references, hover, rename, code actions, and diagnostics in real buffers.
Breakpoints in the gutter, stepping, and a variables panel over the Debug Adapter Protocol.
A real VT/ANSI terminal, alacritty-backed, running your login shell inside a buffer.
A corfu-style in-buffer popup with pluggable completion-at-point functions and an LSP fallback.
Sparklines, bars, braille plots, histograms, and heatmaps — just colored text, so they work in any buffer.
Scheme in, chart out
Define a command, hand plot-histogram a list of numbers, and show it in its own buffer. Bind it to a key, run it from M-x, or drop the same plot into an Org file with plot-insert.
(define-command (latency-report)
(plot-show
(plot-histogram (read-latencies "access.log")
'bins 12 'height 6
'title "latency (ms)")
"*latency*"))read-latencies is yours to write: any list of numbers will do. Text charts reference
latency (ms) 250 ┤ │ ▇▇ │ ▂▂ ▇▇ ██ ▄▄ 125 ┤ ██ ██ ██ ██ ▁▁ │▂▂ ██ ██ ██ ██ ██ 0 ┤██ ██ ██ ██ ██ ██ ██ ▇▇ ▄▄ ▁▁ ▁▁ └──────────────────────────────────── 18ms 59 101ms