{
 "cells": [
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "Author: J. Simmons"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "metadata": {
    "collapsed": false
   },
   "outputs": [
    {
     "data": {
      "application/javascript": [
       "require(['base/js/utils'],\n",
       "function(utils) {\n",
       "    utils.load_extensions('usability/python-markdown/main');\n",
       "});"
      ],
      "text/plain": [
       "<IPython.core.display.Javascript object>"
      ]
     },
     "metadata": {},
     "output_type": "display_data"
    }
   ],
   "source": [
    "%%javascript\n",
    "require(['base/js/utils'],\n",
    "function(utils) {\n",
    "    utils.load_extensions('usability/python-markdown/main');\n",
    "});"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "# Test Units with Pint\n",
    "\n",
    "This section tests using the Pint library to implement units in MTK. The following\n",
    "analysis computes the area of a rectangle."
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "from pint import UnitRegistry\n",
    "units = UnitRegistry()\n",
    "\n",
    "def displayFloat(x):\n",
    "    return '{:~P}'.format(x)\n",
    "\n",
    "#def displayFloat(x, u):\n",
    "#    return displayFloat(x.to(u))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "metadata": {
    "collapsed": true
   },
   "outputs": [],
   "source": [
    "length = 2.5 * units.meter\n",
    "width = 2.0 * units.meter\n",
    "\n",
    "area = length * width\n",
    "\n",
    "force = 20 * units.newton\n",
    "pressure = force / area\n",
    "pressure.ito(units.pascal)"
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {
    "collapsed": true,
    "variables": {
     "displayFloat(area)": "5.0 m²",
     "displayFloat(force)": "20 N",
     "displayFloat(length)": "2.5 m",
     "displayFloat(pressure)": "4.0 Pa",
     "displayFloat(width)": "2.0 m"
    }
   },
   "source": [
    "The area of a rectangle of length {{displayFloat(length)}} and width {{displayFloat(width)}} is {{displayFloat(area)}}. For a force of {{displayFloat(force)}} the pressure on the rectangle is {{displayFloat(pressure)}}."
   ]
  },
  {
   "cell_type": "markdown",
   "metadata": {},
   "source": [
    "---\n",
    "This document is a work of Mach 30 and is licensed under the Creative Commons Attribution 3.0 Unported License. To view a copy of this license, visit http://creativecommons.org/licenses/by/3.0/."
   ]
  }
 ],
 "metadata": {
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   "display_name": "Python 3",
   "language": "python",
   "name": "python3"
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    "name": "ipython",
    "version": 3
   },
   "file_extension": ".py",
   "mimetype": "text/x-python",
   "name": "python",
   "nbconvert_exporter": "python",
   "pygments_lexer": "ipython3",
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