{
 "cells": [
  {
   "cell_type": "markdown",
   "id": "ds-0",
   "metadata": {},
   "source": "# Data structures and strings\n\nCell arrays, structs, key/value maps, and text handling."
  },
  {
   "cell_type": "markdown",
   "id": "ds-1",
   "metadata": {},
   "source": "## Cell arrays hold mixed types"
  },
  {
   "cell_type": "code",
   "id": "ds-2",
   "metadata": {},
   "execution_count": null,
   "outputs": [],
   "source": "c = {42, 'hello', [1 2 3]};\nc{2}\nclass(c{3})\nnumel(c)"
  },
  {
   "cell_type": "markdown",
   "id": "ds-3",
   "metadata": {},
   "source": "## Structs"
  },
  {
   "cell_type": "code",
   "id": "ds-4",
   "metadata": {},
   "execution_count": null,
   "outputs": [],
   "source": "p.name = 'ada';\np.year = 1815;\np.tags = {'math', 'cs'};\nfieldnames(p)\np.tags{1}"
  },
  {
   "cell_type": "markdown",
   "id": "ds-5",
   "metadata": {},
   "source": "## Struct arrays"
  },
  {
   "cell_type": "code",
   "id": "ds-6",
   "metadata": {},
   "execution_count": null,
   "outputs": [],
   "source": "people(1).name = 'A'; people(1).age = 30;\npeople(2).name = 'B'; people(2).age = 25;\nages = [people.age]\nnames = {people.name}"
  },
  {
   "cell_type": "markdown",
   "id": "ds-7",
   "metadata": {},
   "source": "## Key/value maps with containers.Map"
  },
  {
   "cell_type": "code",
   "id": "ds-8",
   "metadata": {},
   "execution_count": null,
   "outputs": [],
   "source": "prices = containers.Map({'apple', 'banana', 'cherry'}, {3, 5, 7});\nprices('banana')\nkeys(prices)"
  },
  {
   "cell_type": "markdown",
   "id": "ds-9",
   "metadata": {},
   "source": "## Formatting and parsing text"
  },
  {
   "cell_type": "code",
   "id": "ds-10",
   "metadata": {},
   "execution_count": null,
   "outputs": [],
   "source": "s = sprintf('%d items at $%.2f = $%.2f', 3, 1.50, 4.50)\nnum2str(pi, 8)\nstr2double('3.14')"
  },
  {
   "cell_type": "markdown",
   "id": "ds-11",
   "metadata": {},
   "source": "## String functions"
  },
  {
   "cell_type": "code",
   "id": "ds-12",
   "metadata": {},
   "execution_count": null,
   "outputs": [],
   "source": "strsplit('a,b,c', ',')\nstrjoin({'x', 'y', 'z'}, '-')\nupper('numbl')\nstrrep('banana', 'a', 'o')"
  },
  {
   "cell_type": "markdown",
   "id": "ds-13",
   "metadata": {},
   "source": "## String arrays and regular expressions"
  },
  {
   "cell_type": "code",
   "id": "ds-14",
   "metadata": {},
   "execution_count": null,
   "outputs": [],
   "source": "names = [\"Ada\" \"Alan\" \"Grace\"];\nnames(2)\ncontains(names, \"A\")\nregexp('id=42; val=7', '\\d+', 'match')"
  }
 ],
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   "codemirror_mode": "octave",
   "file_extension": ".m",
   "mimetype": "text/x-octave",
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