Polynomial features.ipynb

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      "Size of train (2, 2)\n",
      "[[2 3]\n",
      " [2 4]]\n",
      "Size of train (2, 6)\n",
      "[[  1.   2.   3.   4.   6.   9.]\n",
      " [  1.   2.   4.   4.   8.  16.]]\n"
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       "     1   x0   x1  x0^2  x0 x1  x1^2\n",
       "0  1.0  2.0  3.0   4.0    6.0   9.0\n",
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   "source": [
    "import pandas as pd\n",
    "import numpy as np\n",
    "from sklearn.preprocessing import PolynomialFeatures\n",
    "pf = PolynomialFeatures(degree=2, include_bias=True)\n",
    "\n",
    "test = np.array([\n",
    "    [2, 3],\n",
    "    [2, 4]\n",
    "])\n",
    "\n",
    "pf.fit(test)\n",
    "print(\"Size of train\", test.shape)\n",
    "print(test)\n",
    "x = pf.transform(test)\n",
    "print(\"Size of train\", x.shape)\n",
    "print(x)\n",
    "\n",
    "df = pd.DataFrame(x)\n",
    "df.columns = pf.get_feature_names()\n",
    "df.head()"
   ]
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