Numpy_d11_class02.ipynb

# 오후 

# numpy
broadcasting 연산을 지원


오후 수업내용은
colab 확인!


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  "cells": [
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "view-in-github",
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        "<a href=\"https://colab.research.google.com/github/OHTORO87/ai_class/blob/main/0518_%EC%98%A4%ED%9B%84%EC%88%98%EC%97%85.ipynb\" target=\"_parent\"><img src=\"https://colab.research.google.com/assets/colab-badge.svg\" alt=\"Open In Colab\"/></a>"
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    {
      "cell_type": "code",
      "metadata": {
        "id": "QUVj6lJf_xBY"
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      "source": [
        "import numpy as np\n",
        "import pandas as pd"
      ],
      "execution_count": 2,
      "outputs": []
    },
    {
      "cell_type": "markdown",
      "metadata": {
        "id": "fA2Wa0-VAkL5"
      },
      "source": [
        "### 5월 18일 오후 numpy & pandas 정리"
      ]
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    {
      "cell_type": "code",
      "metadata": {
        "id": "KyAsAh0_AD2b"
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      "source": [
        "np11 = np.array([2, 4, 6, 8], dtype=np.int16)\n",
        "np12 = np.array([3, 6, 9, 12 ,15], dtype=np.int16)"
      ],
      "execution_count": 5,
      "outputs": []
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        "id": "vYaUtN9ZAYpO",
        "outputId": "db49f615-3599-4ba5-8386-a4ba57321308"
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      "source": [
        "np11.shape"
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      "execution_count": 6,
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        {
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          "data": {
            "text/plain": [
              "(4,)"
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          "execution_count": 6
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      "source": [
        "np11 += 5"
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      "execution_count": 7,
      "outputs": []
    },
    {
      "cell_type": "code",
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        "id": "uByQSJ1pAyvG",
        "outputId": "767435ae-67e1-4f6f-96a2-7137ca009210"
      },
      "source": [
        "np11"
      ],
      "execution_count": 8,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 7,  9, 11, 13], dtype=int16)"
            ]
          },
          "metadata": {
            "tags": []
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          "execution_count": 8
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    },
    {
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        "id": "oiARdzhaAz7X",
        "outputId": "d44549ca-7ac5-4d21-b438-fa8848efcee3"
      },
      "source": [
        "np11 > 10"
      ],
      "execution_count": 9,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([False, False,  True,  True])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 9
        }
      ]
    },
    {
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        "id": "OSKDlxcpA44_",
        "outputId": "61fd8164-76ed-45e4-fa8b-76b0ceeb2bb8"
      },
      "source": [
        "np11 == 11"
      ],
      "execution_count": 10,
      "outputs": [
        {
          "output_type": "execute_result",
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            "text/plain": [
              "array([False, False,  True, False])"
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          },
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          "execution_count": 10
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      ]
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    {
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        "id": "e1uiZQJuA76X",
        "outputId": "e9fd4563-dfab-41fd-9381-de232a52e131"
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      "source": [
        "np11.__lt__(9)"
      ],
      "execution_count": 13,
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            "text/plain": [
              "array([ True, False, False, False])"
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          "execution_count": 13
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        "id": "BAOtuadsBRfz",
        "outputId": "b157318b-9c98-4d51-d710-3526ebe4c54d"
      },
      "source": [
        "np11 < 9"
      ],
      "execution_count": 12,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ True, False, False, False])"
            ]
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          "metadata": {
            "tags": []
          },
          "execution_count": 12
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      ]
    },
    {
      "cell_type": "code",
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          "base_uri": "https://localhost:8080/"
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        "id": "nZX8TXsyBS0P",
        "outputId": "1b47d960-1176-47dd-af84-0f5e028bec2a"
      },
      "source": [
        "np11"
      ],
      "execution_count": 14,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 7,  9, 11, 13], dtype=int16)"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 14
        }
      ]
    },
    {
      "cell_type": "code",
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        "id": "bkG7eMYwBg6_",
        "outputId": "6425bcf6-ef3e-4893-f79a-cfeb74653b9b"
      },
      "source": [
        "np12"
      ],
      "execution_count": 15,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 3,  6,  9, 12, 15], dtype=int16)"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 15
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "EsP9jUoqBhl2",
        "outputId": "7ec01c70-3196-4867-caa4-8b6c22937c5e"
      },
      "source": [
        "np11.size\n",
        "#개수"
      ],
      "execution_count": 16,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "4"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 16
        }
      ]
    },
    {
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        "id": "5xvnIF3GBnku",
        "outputId": "9c6621db-94b5-428d-e33c-51bb109940e8"
      },
      "source": [
        "np11.nbytes\n",
        "#전체 바이트 용량"
      ],
      "execution_count": 18,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "8"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 18
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "Vvyq6tsvBqO2",
        "outputId": "e171a1d5-aaa2-4609-b5e4-d17202b73ef0"
      },
      "source": [
        "np11.itemsize\n",
        "#하나의 사이즈"
      ],
      "execution_count": 19,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "2"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 19
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "vjZd1wU_BvtO"
      },
      "source": [
        "np13 = np.arange(1, 11)"
      ],
      "execution_count": 20,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
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        "id": "XpVWBA13B9Sn",
        "outputId": "5057a333-66eb-4d3c-956a-72817dad2a5f"
      },
      "source": [
        "np13"
      ],
      "execution_count": 21,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  3,  4,  5,  6,  7,  8,  9, 10])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 21
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ycip7xCAB-AH",
        "outputId": "754ab763-5273-4de2-9c61-d910940a4042"
      },
      "source": [
        "np13[3:7]"
      ],
      "execution_count": 22,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([4, 5, 6, 7])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 22
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "g1UYjccnCP-K",
        "outputId": "3e4df262-fa4b-4360-b88d-67291cf9d778"
      },
      "source": [
        "np13[3:7] +5"
      ],
      "execution_count": 24,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 9, 10, 11, 12])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 24
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "VtUQpko9CSwK"
      },
      "source": [
        "np13[3:7] += 5\n",
        "#더한값을 원 데이터에 적용시키고 싶을때."
      ],
      "execution_count": 25,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "8a8VaDq9Cas6",
        "outputId": "f518f472-e655-4bae-b7ee-512db54e1b89"
      },
      "source": [
        "np13"
      ],
      "execution_count": 26,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  3,  9, 10, 11, 12,  8,  9, 10])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 26
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "ONHGWYwwCcBH"
      },
      "source": [
        "np14 = np.arange(1, 11)"
      ],
      "execution_count": 29,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "MyAzRJlSCvS_"
      },
      "source": [
        "np14[2:5] +=3"
      ],
      "execution_count": 30,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "1v3P5dvgDIQv",
        "outputId": "c4f7a0ba-d3af-4de6-98d3-a52d21ea558e"
      },
      "source": [
        "np14"
      ],
      "execution_count": 31,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  6,  7,  8,  6,  7,  8,  9, 10])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 31
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "7bw8dQeBDI_P"
      },
      "source": [
        "np15 = np14"
      ],
      "execution_count": 32,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "APQHMJAlDXdf"
      },
      "source": [
        "np14[4] = 90"
      ],
      "execution_count": 34,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "eO2L9kSsDcr_",
        "outputId": "e2adaca0-5b44-42c6-da72-cad516ba222e"
      },
      "source": [
        "np14"
      ],
      "execution_count": 35,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  6,  7, 90,  6,  7,  8,  9, 10])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 35
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "rAgTv5UCDjwv",
        "outputId": "dfb238e1-667c-434b-ee4a-3ac6434ec836"
      },
      "source": [
        "np15"
      ],
      "execution_count": 36,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  6,  7, 90,  6,  7,  8,  9, 10])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 36
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "1H0cvCrmDkx3"
      },
      "source": [
        "#id 값이 같아서 동시에 90으로 바뀌었다"
      ],
      "execution_count": 37,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "6t4mWpsMDuYv"
      },
      "source": [
        "np16 = np14.copy()"
      ],
      "execution_count": 38,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "f-kIk7ljD0AX"
      },
      "source": [
        "np14[2] = 555"
      ],
      "execution_count": 39,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ia1yWeMkD3gH",
        "outputId": "be3d83db-e18a-4ad1-e168-6b50bc22432a"
      },
      "source": [
        "np14"
      ],
      "execution_count": 40,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([  1,   2, 555,   7,  90,   6,   7,   8,   9,  10])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 40
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "g0Kj4pQND42f"
      },
      "source": [
        "np14[7:] = 0 "
      ],
      "execution_count": 41,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "kdjcV_hLEHgP",
        "outputId": "474ecb57-8dbf-4f11-9630-273d3f3bd57f"
      },
      "source": [
        "np14"
      ],
      "execution_count": 42,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([  1,   2, 555,   7,  90,   6,   7,   0,   0,   0])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 42
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "XXpsFY_3E2p3"
      },
      "source": [
        "np2 = np.arange(1, 16)"
      ],
      "execution_count": 52,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "duNS7uwrFAzH",
        "outputId": "f70d2c3e-efff-4402-c99d-dd132a1c219f"
      },
      "source": [
        "np2"
      ],
      "execution_count": 53,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 53
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "oyLjlxnRFeI1"
      },
      "source": [
        "np222 = np2.reshape(3, 5)"
      ],
      "execution_count": 57,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "K1HyjgG0Fg-k",
        "outputId": "75915aaf-29e8-4d2b-d3b9-3a39bf18e275"
      },
      "source": [
        "np2"
      ],
      "execution_count": 58,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 58
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
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          "base_uri": "https://localhost:8080/"
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        "id": "MDxWKLyuGDyn",
        "outputId": "5ec9b1c7-0c1b-42a1-a739-f02ac140b611"
      },
      "source": [
        "np222"
      ],
      "execution_count": 59,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 1,  2,  3,  4,  5],\n",
              "       [ 6,  7,  8,  9, 10],\n",
              "       [11, 12, 13, 14, 15]])"
            ]
          },
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            "tags": []
          },
          "execution_count": 59
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    {
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        "id": "epTgH-MrGPyw",
        "outputId": "0cc68cef-a8cb-4353-aa90-8a51404649cd"
      },
      "source": [
        "np2[:]"
      ],
      "execution_count": 60,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([ 1,  2,  3,  4,  5,  6,  7,  8,  9, 10, 11, 12, 13, 14, 15])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 60
        }
      ]
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    {
      "cell_type": "code",
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        "id": "_RFIfiZoGYKA",
        "outputId": "ef64087f-b89f-456d-f1f3-9446efc586a5"
      },
      "source": [
        "np222[:2]"
      ],
      "execution_count": 61,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 1,  2,  3,  4,  5],\n",
              "       [ 6,  7,  8,  9, 10]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 61
        }
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    {
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        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "A-crzYzlGjUw",
        "outputId": "8e67a1d4-9ebd-4d27-89d7-09635947b889"
      },
      "source": [
        "np222[1][3]"
      ],
      "execution_count": 62,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "9"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 62
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "VP1xAJXEG1b4",
        "outputId": "4ec4a14a-a717-4c3f-9c02-59d2aa1d34ca"
      },
      "source": [
        "np222[1, 3]"
      ],
      "execution_count": 63,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "9"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 63
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "K2xQQVLtG20A",
        "outputId": "8ecb985f-0d21-4218-c506-fbf760a54311"
      },
      "source": [
        "np222[:,0:2]"
      ],
      "execution_count": 71,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 1,  2],\n",
              "       [ 6,  7],\n",
              "       [11, 12]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 71
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "ndulNGylHDf3",
        "outputId": "05acec31-ca47-4d55-d03a-d3c46b038c6c"
      },
      "source": [
        "np222[1:4,:]"
      ],
      "execution_count": 72,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 6,  7,  8,  9, 10],\n",
              "       [11, 12, 13, 14, 15]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 72
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "KZKtNSL1Hkkh",
        "outputId": "24ee3149-039e-48fe-aece-92fdc0b63369"
      },
      "source": [
        "np222[:,0:2] + 5"
      ],
      "execution_count": 74,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([[ 6,  7],\n",
              "       [11, 12],\n",
              "       [16, 17]])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 74
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "colab": {
          "base_uri": "https://localhost:8080/"
        },
        "id": "9E94Wg6sJA6Q",
        "outputId": "575278c7-4582-4cc7-f3cb-8ad3670c016e"
      },
      "source": [
        "np222[1,0:2]\n"
      ],
      "execution_count": 75,
      "outputs": [
        {
          "output_type": "execute_result",
          "data": {
            "text/plain": [
              "array([6, 7])"
            ]
          },
          "metadata": {
            "tags": []
          },
          "execution_count": 75
        }
      ]
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "QT_g2SE0L1X5"
      },
      "source": [
        ""
      ],
      "execution_count": null,
      "outputs": []
    },
    {
      "cell_type": "code",
      "metadata": {
        "id": "0ZCC4YH_Tuqp"
      },
      "source": [
        ""
      ],
      "execution_count": null,
      "outputs": []
    }
  ]
}