12 Numpy2_jun13.ipynb

{
 "cells": [
  {
   "cell_type": "code",
   "execution_count": 1,
   "id": "14563048-62b2-48e7-b4cc-314320b0feaf",
   "metadata": {},
   "outputs": [],
   "source": [
    "import numpy as np"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 5,
   "id": "b4ef9fe9-3ffe-4bc1-bb48-f0ada3bef2af",
   "metadata": {},
   "outputs": [],
   "source": [
    "arr = np.array([23, 45, 12, 67, 34])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 7,
   "id": "08b2e915-3b37-4456-babe-9c4ccacc1441",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "[23 45 12 67 34]\n"
     ]
    }
   ],
   "source": [
    "print(arr)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 9,
   "id": "c83e241d-330c-4827-88c3-dd60a04df68d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([23, 45, 12, 67, 34])"
      ]
     },
     "execution_count": 9,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 11,
   "id": "d6e59e8b-db04-4590-8546-524da07264de",
   "metadata": {},
   "outputs": [],
   "source": [
    "arr = np.array([23, 45, 12, 67, 34, 12.13])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 17,
   "id": "d8a31648-4468-4dc2-b969-2ddc8aa521f2",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "dtype('float64')"
      ]
     },
     "execution_count": 17,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr.dtype"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 19,
   "id": "b0b487f7-438f-4c7d-a171-2431a8a9c09c",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([23.  , 45.  , 12.  , 67.  , 34.  , 12.13])"
      ]
     },
     "execution_count": 19,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 15,
   "id": "a8918f2b-3689-43ce-a0f9-5201aeb9f039",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "numpy.ndarray"
      ]
     },
     "execution_count": 15,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "type(arr)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 21,
   "id": "f89ca14e-722b-4ab0-92a9-e946766e1941",
   "metadata": {},
   "outputs": [],
   "source": [
    "arr1 = np.array([23, 45, 12, 67, 34, 12.13, 'Pune'])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 23,
   "id": "bc9b272d-8d21-4673-bc5b-9454f7c6cd9a",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array(['23', '45', '12', '67', '34', '12.13', 'Pune'], dtype='<U32')"
      ]
     },
     "execution_count": 23,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr1"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 25,
   "id": "4c6ca9d4-a165-4958-b6dc-1e83fe8bc9ab",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "'12'"
      ]
     },
     "execution_count": 25,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr1[2]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 27,
   "id": "a7e5a843-d0b5-417a-a412-87bffba4da4f",
   "metadata": {},
   "outputs": [
    {
     "name": "stdout",
     "output_type": "stream",
     "text": [
      "2.85 µs ± 394 ns per loop (mean ± std. dev. of 7 runs, 100,000 loops each)\n"
     ]
    }
   ],
   "source": [
    "%%timeit\n",
    "arr1 = np.array([23, 45, 12, 67, 34, 12.13, 'Pune'])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 29,
   "id": "08713ea7-f928-4167-91dd-bae121c6e7de",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([23.  , 45.  , 12.  , 67.  , 34.  , 12.13])"
      ]
     },
     "execution_count": 29,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 31,
   "id": "56f4d473-3811-4007-b6d4-5696526d7b18",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "1"
      ]
     },
     "execution_count": 31,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr.ndim"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 35,
   "id": "860539bc-c5b7-4671-ba8a-c75ebb54f77d",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11])"
      ]
     },
     "execution_count": 35,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.arange(12)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 37,
   "id": "f159501a-3370-4c1f-bfb0-8d54915700e2",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([5, 6, 7, 8, 9])"
      ]
     },
     "execution_count": 37,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.arange(5, 10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 41,
   "id": "abb59052-297a-49f5-82a6-320d1c6a87d4",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([ 2. ,  4.5,  7. ,  9.5, 12. , 14.5, 17. , 19.5])"
      ]
     },
     "execution_count": 41,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.arange(2, 21, 2.5)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 43,
   "id": "fd08b940-4ab0-450e-beb0-df3945e9ca87",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([0., 0., 0., 0., 0., 0., 0., 0., 0., 0.])"
      ]
     },
     "execution_count": 43,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.zeros(10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 45,
   "id": "def7ada5-cb0c-4fdf-a72a-f5ff69ed58e6",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([1., 1., 1., 1., 1., 1., 1., 1., 1., 1.])"
      ]
     },
     "execution_count": 45,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.ones(10)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 33,
   "id": "9eb3bc26-9fce-49dd-b944-4afa65a2646c",
   "metadata": {},
   "outputs": [],
   "source": [
    "# 2d array"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 47,
   "id": "229505ea-17c8-409b-823a-2526f7f4e111",
   "metadata": {},
   "outputs": [],
   "source": [
    "arr2 = np.array([[1,2,3], [4,5,6], [7,8,9], [10,11,12]])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 49,
   "id": "7577288d-13e1-47e5-a7b4-662504068936",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2,  3],\n",
       "       [ 4,  5,  6],\n",
       "       [ 7,  8,  9],\n",
       "       [10, 11, 12]])"
      ]
     },
     "execution_count": 49,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 51,
   "id": "9062540b-33e5-4e27-869d-45fbeb166c71",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(4, 3)"
      ]
     },
     "execution_count": 51,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.shape"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 53,
   "id": "41386510-0c06-465a-b0e2-4f0c583cc7e6",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "12"
      ]
     },
     "execution_count": 53,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.size"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 55,
   "id": "2b46ad51-905a-4ac2-aa7a-62858e989a58",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2,  3],\n",
       "       [ 4,  5,  6],\n",
       "       [ 7,  8,  9],\n",
       "       [10, 11, 12]])"
      ]
     },
     "execution_count": 55,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 57,
   "id": "2a567f05-6c2a-43ae-8a74-8bc5d564fe4b",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "2"
      ]
     },
     "execution_count": 57,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.ndim"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 59,
   "id": "215e047b-857a-40f9-9f78-c7a24bb8a9a8",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([ 1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12])"
      ]
     },
     "execution_count": 59,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.flatten()"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 61,
   "id": "1b0378f3-a0ff-4c5c-afa1-5dff74ab0e12",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "(4, 3)"
      ]
     },
     "execution_count": 61,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.shape"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 63,
   "id": "033166e3-c512-4569-beb2-eaff7cb6abac",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2,  3,  4],\n",
       "       [ 5,  6,  7,  8],\n",
       "       [ 9, 10, 11, 12]])"
      ]
     },
     "execution_count": 63,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.reshape(3, 4)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 65,
   "id": "2b03a6f2-732a-4f33-bc42-c064e08ca2dd",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2],\n",
       "       [ 3,  4],\n",
       "       [ 5,  6],\n",
       "       [ 7,  8],\n",
       "       [ 9, 10],\n",
       "       [11, 12]])"
      ]
     },
     "execution_count": 65,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.reshape(6, 2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 67,
   "id": "74fb56ff-300a-4478-b7e2-02e2eb948be0",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2],\n",
       "       [ 3,  4],\n",
       "       [ 5,  6],\n",
       "       [ 7,  8],\n",
       "       [ 9, 10],\n",
       "       [11, 12]])"
      ]
     },
     "execution_count": 67,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.reshape(6, -1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 69,
   "id": "8198ccdf-c677-4f84-9f9e-e6e9768899d4",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[[ 1,  2],\n",
       "        [ 3,  4]],\n",
       "\n",
       "       [[ 5,  6],\n",
       "        [ 7,  8]],\n",
       "\n",
       "       [[ 9, 10],\n",
       "        [11, 12]]])"
      ]
     },
     "execution_count": 69,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.reshape(3,2,2)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 71,
   "id": "7e347435-4bb2-4ab5-92d4-46bd2391d5ef",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[[ 1],\n",
       "        [ 2],\n",
       "        [ 3]],\n",
       "\n",
       "       [[ 4],\n",
       "        [ 5],\n",
       "        [ 6]],\n",
       "\n",
       "       [[ 7],\n",
       "        [ 8],\n",
       "        [ 9]],\n",
       "\n",
       "       [[10],\n",
       "        [11],\n",
       "        [12]]])"
      ]
     },
     "execution_count": 71,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2.reshape(4,3,-1)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 73,
   "id": "55717c48-57a8-43f0-8ccc-dfbe4d88da49",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2,  3],\n",
       "       [ 4,  5,  6],\n",
       "       [ 7,  8,  9],\n",
       "       [10, 11, 12]])"
      ]
     },
     "execution_count": 73,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 75,
   "id": "8f3696f8-2ef1-461c-a62b-32b0fb252318",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([23.  , 45.  , 12.  , 67.  , 34.  , 12.13])"
      ]
     },
     "execution_count": 75,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 77,
   "id": "0123dd03-ed14-4076-b153-ba6938804b32",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([45., 12., 67.])"
      ]
     },
     "execution_count": 77,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr[1:4]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 79,
   "id": "76ad5d3f-20e4-4e26-bf9b-8045ea9991e0",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 1,  2,  3],\n",
       "       [ 4,  5,  6],\n",
       "       [ 7,  8,  9],\n",
       "       [10, 11, 12]])"
      ]
     },
     "execution_count": 79,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 81,
   "id": "67619f79-148b-43fe-8468-f72ebe352ce7",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[4, 5],\n",
       "       [7, 8]])"
      ]
     },
     "execution_count": 81,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2[1:3,0:2]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 85,
   "id": "462906c8-7e45-4b00-b189-d4a8a8585d85",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[1, 2, 3],\n",
       "       [4, 5, 6],\n",
       "       [7, 8, 9]])"
      ]
     },
     "execution_count": 85,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2[0:3,:]"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 87,
   "id": "3a6579da-d475-4530-9be8-ce9e7fe8ddf5",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([23.  , 45.  , 12.  , 67.  , 34.  , 12.13])"
      ]
     },
     "execution_count": 87,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 89,
   "id": "d3aa43d4-71a6-4ee2-96e6-0ed47e3c3de4",
   "metadata": {},
   "outputs": [],
   "source": [
    "arr = np.array([1,2,3,1,4,2,6,2,2])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 91,
   "id": "8b9415b4-91f9-426d-86a2-d786ba08e848",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([1, 2, 3, 4, 6])"
      ]
     },
     "execution_count": 91,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.unique(arr)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 101,
   "id": "c5793fb8-4ac6-48ce-8ba6-83574f3e2747",
   "metadata": {},
   "outputs": [],
   "source": [
    "arr3 = np.array([[1,2,3], [4,5,6], [7,8,9]])"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 103,
   "id": "aaec8e3e-4e98-42dc-9e94-d2b145ddfaa3",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 3.15251974e+15, -6.30503948e+15,  3.15251974e+15],\n",
       "       [-6.30503948e+15,  1.26100790e+16, -6.30503948e+15],\n",
       "       [ 3.15251974e+15, -6.30503948e+15,  3.15251974e+15]])"
      ]
     },
     "execution_count": 103,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "np.linalg.inv(arr3)"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": 105,
   "id": "b0210f12-589d-4a38-b3ec-4cd958503575",
   "metadata": {},
   "outputs": [
    {
     "data": {
      "text/plain": [
       "array([[ 30,  36,  42],\n",
       "       [ 66,  81,  96],\n",
       "       [102, 126, 150],\n",
       "       [138, 171, 204]])"
      ]
     },
     "execution_count": 105,
     "metadata": {},
     "output_type": "execute_result"
    }
   ],
   "source": [
    "arr2 @ arr3"
   ]
  },
  {
   "cell_type": "code",
   "execution_count": null,
   "id": "d7970df3-34f0-4e11-b27d-bfed5e9a6135",
   "metadata": {},
   "outputs": [],
   "source": []
  }
 ],
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   "name": "python3"
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  "language_info": {
   "codemirror_mode": {
    "name": "ipython",
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   "file_extension": ".py",
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