OD_weights.ipynb

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  {
   "cell_type": "code",
   "execution_count": 1,
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   "source": [
    "import pysal as ps\n",
    "from pysal import weights as w\n",
    "import numpy as np\n",
    "import scipy.sparse as sp"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "metadata": {
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   "source": [
    "#check transformation\n",
    "\n",
    "def OD(Wo, Wd):\n",
    "    Wo = Wo.sparse\n",
    "    Wd = Wd.sparse\n",
    "    Ww = sp.kron(Wo, Wd)\n",
    "    return w.WSP2W(w.WSP(Ww))"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
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   },
   "outputs": [
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     "name": "stdout",
     "output_type": "stream",
     "text": [
      "(16, 16)\n"
     ]
    }
   ],
   "source": [
    "origins = ps.weights.lat2W(2,2)\n",
    "dests = ps.weights.lat2W(2,2)\n",
    "Ww = OD(origins, dests)\n",
    "Ww.transform = 'r'\n",
    "print Ww.full()[0].shape"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
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   "outputs": [
    {
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     "text": [
      "[[ 0]\n",
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      "[[ 28.  ]\n",
      " [ 53.25]\n",
      " [ 53.25]\n",
      " [ 28.  ]\n",
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   "source": [
    "flows = np.random.randint(0,100, (4,4))\n",
    "np.fill_diagonal(flows, 0)\n",
    "flows = flows.reshape((16,1))\n",
    "print flows\n",
    "slag = ps.lag_spatial(Ww, flows)\n",
    "print slag"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
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   "outputs": [
    {
     "data": {
      "text/plain": [
       "{0: [1.0, 1.0], 1: [1.0, 1.0], 2: [1.0, 1.0], 3: [1.0, 1.0]}"
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     "execution_count": 5,
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   ],
   "source": [
    "origins.weights"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 6,
   "metadata": {
    "collapsed": false
   },
   "outputs": [],
   "source": [
    "import os\n",
    "os.chdir('/Users/toshan/dev/pysal/pysal/weights')\n",
    "from spintW import ODW"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 16,
   "metadata": {
    "collapsed": false,
    "scrolled": true
   },
   "outputs": [],
   "source": [
    "origins = ps.weights.lat2W(2,2)\n",
    "dests = ps.weights.lat2W(2,2)\n",
    "Ww = ODW(origins, dests)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "metadata": {
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   ],
   "source": [
    "Ww.full()[0]"
   ]
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