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hellofff

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// at time 0 (when t_in=0) values for x and dy are 0, while value for y is 50 (values hardcoded below).
// the floor is at y=190 so the ball will start falling until it reaches 190, and then bounce.
// dy calculates the change to y in each time step (except where the "floor rule" bites).
// dy is 3 at t_in=1 and is influenced by a dampener input

/////////// model ///////////

// explicit inputs (by convention):
export const t = () => t_in;
export const dx = () => dx_in;

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**Shell of DN blog for [calculang](https://github.com/calculang/calculang)**

Under motivation I list:

- separation of concerns
- unity
- transparency
- democratisation of numbers

I need to elaborate on these, e.g. in relation to some examples.

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p5(sketch => {
    sketch.setup = function () {
        sketch.createCanvas(width, 200);
    };
    var x = 0, y = 50, dy = 0;
    sketch.draw = function () {
        if (x > 600) { x = 0; y = 50; dy = 0; }
        sketch.background("#001b42");

        x += dx_in;

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{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "facet": {"row": {"field": "function", "type": "ordinal"}},
  "data": {
    "values":[{"t_in":0,"dx_in":-3,"function":"x","value":97},{"t_in":0,"dx_in":0,"function":"x","value":100},{"t_in":0,"dx_in":3,"function":"x","value":103},{"t_in":1,"dx_in":-3,"function":"x","value":94},{"t_in":1,"dx_in":0,"function":"x","value":100},{"t_in":1,"dx_in":3,"function":"x","value":106},{"t_in":2,"dx_in":-3,"function":"x","value":91},{"t_in":2,"dx_in":0,"function":"x","value":100},{"t_in":2,"dx_in":3,"function":"x","value":109},{"t_in":3,"dx_in":-3,"function":"x","value":88},{"t_in":3,"dx_in":0,"function":"x","value":100},{"t_in":3,"dx_in":3,"function":"x","value":112},{"t_in":4,"dx_in":-3,"function":"x","value":85},{"t_in":4,"dx_in":0,"function":"x","value":100},{"t_in":4,"dx_in":3,"function":"x","value":115},{"t_in":5,"dx_in":-3,"function":"x","value":82},{"t_in":5,"dx_in":0,"function":"x","value":100},{"t_in":5,"dx_in":3,"function":"x","value":118},{"dx_i

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{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "description": "description TODO",
  "data": {
    "values": [
      {"t_in": 0, "dx_in": -3, "function": "x", "value": 97},
      {"t_in": 0, "dx_in": 0, "function": "x", "value": 100},
      {"t_in": 0, "dx_in": 3, "function": "x", "value": 103},
      {"t_in": 1, "dx_in": -3, "function": "x", "value": 94},
      {"t_in": 1, "dx_in": 0, "function": "x", "value": 100},

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[
  {
    "budgetYear": 0,   
    "forecastYear": -1,
    "value": 100       
  },
  {
    "budgetYear": 0,
    "forecastYear": 0,
    "value": 104.5

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{
  "$schema": "https://vega.github.io/schema/vega/v5.json",
  "description": "A recreation of a New York Times chart showing U.S. budget forecasts versus reality.",
  "width": 700,
  "height": 400,
  "padding": 5,
  "background": "#edf1f7",

  "config": {
    "axisBand": {

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[
  {
    "detail": -1,
    "type": "Actual",
    "function": "subs",
    "year": -1,
    "value": 100
  },
  {
    "detail": -1,

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{
  "$schema": "https://vega.github.io/schema/vega-lite/v5.json",
  "data": {"url": "https://gist.githubusercontent.com/declann/a1ee5de2ab49980f94f58ef9af20ca96/raw/52d4e16584e4abfab765e37495392eb7e3b87b18/gistfile1.txt"},
  "mark": {"type": "line", "point": true},
  "encoding": {
    "x": {"field": "year", "type": "ordinal"},
    "y": {"field": "value", "type": "quantitative", "scale": {"zero": false}},
    "detail": {"field": "detail", "type": "ordinal"}
  }
}