{
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  {
   "cell_type": "markdown",
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   "metadata": {},
   "source": [
    "# Sort\n",
    "\n",
    "As in Python’s `list`, NumPy arrays can be sorted in-place using the [numpy.sort](https://numpy.org/doc/stable/reference/generated/numpy.sort.html) method. You can sort any one-dimensional section of values in a multidimensional array in place along an axis by passing the axis number to sort:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "a4099946",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[-0.61482053,  0.17896449, -1.29336591],\n",
       "       [ 0.08364197,  0.67494142, -0.59437682],\n",
       "       [-1.72673297,  0.96615644,  1.60456092],\n",
       "       [ 0.98478964, -0.70769764,  0.60908458],\n",
       "       [ 2.572301  ,  1.20356725,  0.10333016],\n",
       "       [-0.57424083,  0.87287599,  0.47258124],\n",
       "       [ 1.2490576 ,  0.99737005, -0.73766589]])"
      ]
     },
     "execution_count": 1,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "import numpy as np\n",
    "\n",
    "\n",
    "data = np.random.randn(7, 3)\n",
    "\n",
    "data"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 2,
   "id": "b2d7e426",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[-1.72673297, -0.70769764, -1.29336591],\n",
       "       [-0.61482053,  0.17896449, -0.73766589],\n",
       "       [-0.57424083,  0.67494142, -0.59437682],\n",
       "       [ 0.08364197,  0.87287599,  0.10333016],\n",
       "       [ 0.98478964,  0.96615644,  0.47258124],\n",
       "       [ 1.2490576 ,  0.99737005,  0.60908458],\n",
       "       [ 2.572301  ,  1.20356725,  1.60456092]])"
      ]
     },
     "execution_count": 2,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "data.sort(0)\n",
    "\n",
    "data"
   ]
  },
  {
   "cell_type": "markdown",
   "id": "bccf7aeb",
   "metadata": {},
   "source": [
    "`np.sort`, on the other hand, returns a sorted copy of an array instead of changing the array in place:"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 3,
   "id": "4d6e17da",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[-1.72673297, -1.29336591, -0.70769764],\n",
       "       [-0.73766589, -0.61482053,  0.17896449],\n",
       "       [-0.59437682, -0.57424083,  0.67494142],\n",
       "       [ 0.08364197,  0.10333016,  0.87287599],\n",
       "       [ 0.47258124,  0.96615644,  0.98478964],\n",
       "       [ 0.60908458,  0.99737005,  1.2490576 ],\n",
       "       [ 1.20356725,  1.60456092,  2.572301  ]])"
      ]
     },
     "execution_count": 3,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.sort(data, axis=1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 4,
   "id": "97af8303",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[-1.72673297, -0.70769764, -1.29336591],\n",
       "       [-0.61482053,  0.17896449, -0.73766589],\n",
       "       [-0.57424083,  0.67494142, -0.59437682],\n",
       "       [ 0.08364197,  0.87287599,  0.10333016],\n",
       "       [ 0.98478964,  0.96615644,  0.47258124],\n",
       "       [ 1.2490576 ,  0.99737005,  0.60908458],\n",
       "       [ 2.572301  ,  1.20356725,  1.60456092]])"
      ]
     },
     "execution_count": 4,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "data"
   ]
  }
 ],
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