Command line

notatio is a normal, nix-y command-line tool: give it an expression and it prints the result and exits. The terminal below runs the actual CLI in your browser — the $ notatio prompt is fixed, so you just type the arguments. Pick an example from the dropdown, hit ▶ Play to run through the corpus, or type your own (e.g. -f wolfram "x^2 + 1").

For the interactive session (persistent state, In[n]/Out[n], :plot), see the REPL playground; for the full reference, the CLI docs.

Text on stdout is going somewhere that cannot move a slider, so a result with controls in it is reduced — try "Manipulate(a^2 + b, (a, 0, 1), ((b, 2), 0, 3))", or --env print on the same thing for small multiples. The Environments group in the dropdown runs both; Environments explains the rest.

Running it for real

From a checkout of the monorepo:

pnpm --filter @enumeratio/cli exec tsx src/main.ts "Binomial(10, 3)"
# or, after `pnpm --filter @enumeratio/cli build`:
node packages/cli/bin/notatio.mjs "Binomial(10, 3)"

-f/--form picks the output form, -i/--in the input syntax, -c <expr> passes the expression explicitly. With no expression on a TTY it drops into the REPL.

The full form/syntax names are notatio, tex, mathjson, wolfram, epsil, numpy, glsl, wgsl, js (forms) and latex, mathjson, wolfram, epsil (syntaxes) — but any unambiguous prefix works, so -f wolf, -f math, and -i w all resolve.

Quoting LaTeX

The default is Epsil, so most input needs no backslashes at all — Sqrt(x^2 + 1), Binomial(10, 3). For LaTeX, use $…$ islands or -i latex. LaTeX is backslash-heavy and the shell wants to eat backslashes, so single-quote the expression (no expansion inside '…'), or — for anything long — pipe a heredoc on stdin, which needs no escaping at all:

notatio '$\frac{d}{dx}\sin(x^2)$'    # 2 * x * Cos(x ^ 2)

notatio -i latex -f numpy <<'EOF'
\sqrt{x^2 + 1}
EOF
# np.sqrt(x ** 2 + 1)

A quoted heredoc (<<'EOF') is literal — the backslashes reach notatio intact.

Composing in a shell

Because it's a plain filter — stdin in, result out, non-zero exit on error — it composes like any other unix tool (these use a real shell, not the terminal above):

# read the expression from stdin
echo "2 + 40" | notatio                      # 42

# capture a compiled form
src=$(notatio -f js "x^2 + 1")               # (_.x * _.x) + 1

# fail loudly in a pipeline
notatio ":wolfram 1 +" || echo "evaluation failed"