{
  "nbformat": 4,
  "nbformat_minor": 0,
  "metadata": {
    "colab": {
      "name": "pytorch beginners.ipynb",
      "version": "0.3.2",
      "provenance": [],
      "collapsed_sections": [],
      "include_colab_link": true
    },
    "kernelspec": {
      "name": "python3",
      "display_name": "Python 3"
    }
  },
  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "view-in-github",
        "colab_type": "text"
      },
      "source": [
        "<a href=\"https://colab.research.google.com/github/arunslb123/PyTorch-Tutorial/blob/master/pytorch_beginners.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
      ]
    },
    {
      "metadata": {
        "id": "vz7PYT6L8XkK",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        "import torch\n",
        "import numpy as np\n",
        "import matplotlib.pyplot as plt\n",
        "%matplotlib inline"
      ],
      "execution_count": 0,
      "outputs": []
    },
    {
      "metadata": {
        "id": "4-n4KgVb8pWa",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        "a = torch.tensor([1,2,3,4,5,6])"
      ],
      "execution_count": 0,
      "outputs": []
    },
    {
      "metadata": {
        "id": "BBcM1DPw_wU1",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "fec99134-87e8-405c-f44e-3548faf79282"
      },
      "cell_type": "code",
      "source": [
        "a.dtype"
      ],
      "execution_count": 8,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "torch.int64"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 8
        }
      ]
    },
    {
      "metadata": {
        "id": "PDsaKcVgAIQI",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "42aa81f4-dc14-4abb-839e-fef05c83a96f"
      },
      "cell_type": "code",
      "source": [
        "b = torch.FloatTensor([1,2,3,4,5,6])\n",
        "b.dtype"
      ],
      "execution_count": 9,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "torch.float32"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 9
        }
      ]
    },
    {
      "metadata": {
        "id": "1bjuAAIUASfB",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "3a9cecda-daf2-4cae-8b13-7977735b273e"
      },
      "cell_type": "code",
      "source": [
        "b.size()"
      ],
      "execution_count": 10,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "torch.Size([6])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 10
        }
      ]
    },
    {
      "metadata": {
        "id": "W9_oH323ATsI",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "ccc5ac79-84f2-41b3-87da-d31dc1a0e40b"
      },
      "cell_type": "code",
      "source": [
        "c = torch.Tensor([1,2,3])\n",
        "c.dtype"
      ],
      "execution_count": 11,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "torch.float32"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 11
        }
      ]
    },
    {
      "metadata": {
        "id": "5mD0lzrsA1LD",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 68
        },
        "outputId": "9fefc0ea-aa3a-4519-e494-24a61302c7df"
      },
      "cell_type": "code",
      "source": [
        "b.view(3,2)"
      ],
      "execution_count": 12,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([[1., 2.],\n",
              "        [3., 4.],\n",
              "        [5., 6.]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 12
        }
      ]
    },
    {
      "metadata": {
        "id": "VMBYIutPA2pr",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "06b3c6d1-6e10-463c-b618-6455d9c6bd58"
      },
      "cell_type": "code",
      "source": [
        "a = torch.arange(9)\n",
        "a"
      ],
      "execution_count": 13,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([0, 1, 2, 3, 4, 5, 6, 7, 8])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 13
        }
      ]
    },
    {
      "metadata": {
        "id": "E4O1rGn-A67T",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 68
        },
        "outputId": "7ffc8ea3-10a0-4cb1-d4e8-e14a9d7a08fc"
      },
      "cell_type": "code",
      "source": [
        "a.view(3,3)"
      ],
      "execution_count": 14,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([[0, 1, 2],\n",
              "        [3, 4, 5],\n",
              "        [6, 7, 8]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 14
        }
      ]
    },
    {
      "metadata": {
        "id": "E7TjZ9MZA80j",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        "a = torch.arange(27)\n",
        "a = a.view(3,3,3)"
      ],
      "execution_count": 0,
      "outputs": []
    },
    {
      "metadata": {
        "id": "mkyuKZSIBdBH",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 204
        },
        "outputId": "68b86d2b-953c-419a-d374-c64f13a1f2e4"
      },
      "cell_type": "code",
      "source": [
        "a"
      ],
      "execution_count": 16,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([[[ 0,  1,  2],\n",
              "         [ 3,  4,  5],\n",
              "         [ 6,  7,  8]],\n",
              "\n",
              "        [[ 9, 10, 11],\n",
              "         [12, 13, 14],\n",
              "         [15, 16, 17]],\n",
              "\n",
              "        [[18, 19, 20],\n",
              "         [21, 22, 23],\n",
              "         [24, 25, 26]]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 16
        }
      ]
    },
    {
      "metadata": {
        "id": "kSC7VL_HBdQt",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "434aa72a-5ce9-4fe7-84ef-1ff0bccab758"
      },
      "cell_type": "code",
      "source": [
        "a[1,1,1]"
      ],
      "execution_count": 17,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor(13)"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 17
        }
      ]
    },
    {
      "metadata": {
        "id": "UjhD37fJBqo2",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        "a = torch.tensor([1,2,3])\n",
        "b = torch.tensor([1,2,3]).view(3,1)"
      ],
      "execution_count": 0,
      "outputs": []
    },
    {
      "metadata": {
        "id": "uDI4Ib2yB4sc",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "e3a2a419-0565-4f96-b3b9-3b5e2decedd0"
      },
      "cell_type": "code",
      "source": [
        "a"
      ],
      "execution_count": 19,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([1, 2, 3])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 19
        }
      ]
    },
    {
      "metadata": {
        "id": "_7gN68F2B5E8",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 68
        },
        "outputId": "a36cad54-ec3d-47b7-93ef-bebb92b2eb0e"
      },
      "cell_type": "code",
      "source": [
        "b"
      ],
      "execution_count": 20,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([[1],\n",
              "        [2],\n",
              "        [3]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 20
        }
      ]
    },
    {
      "metadata": {
        "id": "fov-e_lgB5U7",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 68
        },
        "outputId": "4b7b396b-979d-4487-9ab9-01474bc0a892"
      },
      "cell_type": "code",
      "source": [
        "a*b"
      ],
      "execution_count": 21,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([[1, 2, 3],\n",
              "        [2, 4, 6],\n",
              "        [3, 6, 9]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 21
        }
      ]
    },
    {
      "metadata": {
        "id": "G_yflvTeB6fM",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "acb11928-d8b2-49ea-b10d-61a90e88d2ce"
      },
      "cell_type": "code",
      "source": [
        "a@b"
      ],
      "execution_count": 23,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor([14])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 23
        }
      ]
    },
    {
      "metadata": {
        "id": "13muWnuIB94R",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "0fb74e66-0fb9-4336-aad6-f92ca2ae20ef"
      },
      "cell_type": "code",
      "source": [
        "a = torch.tensor([1,2,3])\n",
        "b = torch.tensor([1,2,3])\n",
        "torch.dot(a,b)"
      ],
      "execution_count": 24,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor(14)"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 24
        }
      ]
    },
    {
      "metadata": {
        "id": "XpCGIBEXCZdQ",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "6a3710db-0a08-4f38-bfa4-300402433dd8"
      },
      "cell_type": "code",
      "source": [
        "x = torch.tensor(2.0, requires_grad=True)\n",
        "x"
      ],
      "execution_count": 26,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor(2., requires_grad=True)"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 26
        }
      ]
    },
    {
      "metadata": {
        "id": "zB9dvIuBCp5m",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        "y = 5*x**2 + 20*x "
      ],
      "execution_count": 0,
      "outputs": []
    },
    {
      "metadata": {
        "id": "mtanR87PCyCV",
        "colab_type": "code",
        "colab": {
          "base_uri": "https://localhost:8080/",
          "height": 34
        },
        "outputId": "cdd1f513-4b28-4567-ce73-d9de9707f205"
      },
      "cell_type": "code",
      "source": [
        "y.backward()\n",
        "x.grad"
      ],
      "execution_count": 28,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "tensor(40.)"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 28
        }
      ]
    },
    {
      "metadata": {
        "id": "VxUVo1GgC0d-",
        "colab_type": "code",
        "colab": {}
      },
      "cell_type": "code",
      "source": [
        ""
      ],
      "execution_count": 0,
      "outputs": []
    }
  ]
}