2-Indexing,Condition,Operations.ipynb

{"nbformat":4,"nbformat_minor":0,"metadata":{"colab":{"name":"2-Indexing,Condition,Operations.ipynb","provenance":[],"collapsed_sections":["AD3SuvR1PBhS"],"toc_visible":true,"authorship_tag":"ABX9TyOD1E5Khkt+Rhh7ZkVAt5yC"},"kernelspec":{"name":"python3","display_name":"Python 3"},"language_info":{"name":"python"}},"cells":[{"cell_type":"markdown","source":["# **NumPy Indexing and Selection**"],"metadata":{"id":"iOEwIu4i_aMJ"}},{"cell_type":"code","source":["import numpy as np"],"metadata":{"id":"vJFRWtZR_dbI"},"execution_count":null,"outputs":[]},{"cell_type":"code","source":["#Creating sample array\n","arr=np.arange(0,11)"],"metadata":{"id":"BR11NPj2_dfD"},"execution_count":null,"outputs":[]},{"cell_type":"code","source":["arr"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"8CEWlfZn_dif","executionInfo":{"status":"ok","timestamp":1657739834525,"user_tz":-180,"elapsed":7,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"e1764ffb-a17f-49eb-8a4f-000a061b7334"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10])"]},"metadata":{},"execution_count":3}]},{"cell_type":"markdown","source":["**Bracket Indexing and Selection**\n","\n","The simplest way to pick one or some elements of an array looks very similar to python lists:"],"metadata":{"id":"Daq-Rvvo_oU6"}},{"cell_type":"code","source":["arr[8]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"z2Oskiwb_d75","executionInfo":{"status":"ok","timestamp":1657739867570,"user_tz":-180,"elapsed":331,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"89de45f0-dd1c-4393-81e3-7c7f237111bf"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["8"]},"metadata":{},"execution_count":4}]},{"cell_type":"code","source":["# Negative indexing works like in python lists\n","arr[-1]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"RdF4q5J3_d-_","executionInfo":{"status":"ok","timestamp":1657739879379,"user_tz":-180,"elapsed":5,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"9e7a63e8-3912-48a3-cb50-1ee80a343029"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["10"]},"metadata":{},"execution_count":5}]},{"cell_type":"code","source":["# Get values in a range\n","arr[1:5]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"4zRzX9B-_eCW","executionInfo":{"status":"ok","timestamp":1657739894260,"user_tz":-180,"elapsed":297,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"b3f03e40-3afa-4c6f-c145-207090b0342c"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([1, 2, 3, 4])"]},"metadata":{},"execution_count":6}]},{"cell_type":"code","source":["# arr[start:stop:step], odds\n","arr[1::2]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"DyqrhiiC_3HP","executionInfo":{"status":"ok","timestamp":1657739911263,"user_tz":-180,"elapsed":313,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"11a8e8d6-1df1-47f1-db04-e1000e755670"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([1, 3, 5, 7, 9])"]},"metadata":{},"execution_count":7}]},{"cell_type":"code","source":["# arr[start:stop:step], evens\n","arr[0::2]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"3ks9L776_3J2","executionInfo":{"status":"ok","timestamp":1657739923974,"user_tz":-180,"elapsed":301,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"2e7e175f-bc18-4246-9499-953cb53314b8"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 0,  2,  4,  6,  8, 10])"]},"metadata":{},"execution_count":8}]},{"cell_type":"markdown","source":["# Indexing a 2D array (matrices)\n","\n","The general format is arr_2d[row][col] or arr_2d[row,col]. I recommend usually using the comma notation for clarity."],"metadata":{"id":"0IBvgQmpADhe"}},{"cell_type":"code","source":["arr_2d=np.array([[5,10,15],[20,25,30],[35,40,45]])\n","\n","arr_2d"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"tFz0vtMB_3RA","executionInfo":{"status":"ok","timestamp":1657740015798,"user_tz":-180,"elapsed":295,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"5a1743e4-df8b-422d-d06f-c43e59e8f081"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 5, 10, 15],\n","       [20, 25, 30],\n","       [35, 40, 45]])"]},"metadata":{},"execution_count":9}]},{"cell_type":"code","source":["arr_2d[1]       #Indexing row"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"ic943VSs_3T8","executionInfo":{"status":"ok","timestamp":1657740038532,"user_tz":-180,"elapsed":284,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"df451591-43d7-4679-fb74-c7462d16c430"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([20, 25, 30])"]},"metadata":{},"execution_count":10}]},{"cell_type":"code","source":["# Format is arr_2d[row][col] or arr_2d[row,col]\n","# Getting individual element value\n","\n","arr_2d[1][2]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"NT8_kx8eAaEi","executionInfo":{"status":"ok","timestamp":1657740097898,"user_tz":-180,"elapsed":279,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"2fc9e054-64ba-4862-a4d7-91db9ee5b8f5"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["30"]},"metadata":{},"execution_count":11}]},{"cell_type":"code","source":["arr_2d[2,1]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"tBQYJWQOAaHZ","executionInfo":{"status":"ok","timestamp":1657740166592,"user_tz":-180,"elapsed":330,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"8be08ead-8456-4e75-bdca-5fbaba377459"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["40"]},"metadata":{},"execution_count":12}]},{"cell_type":"code","source":["arr_2d"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"M6026c61AaJz","executionInfo":{"status":"ok","timestamp":1657742177091,"user_tz":-180,"elapsed":285,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"f0933671-9f67-42c8-9d48-96814c46073c"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 5, 10, 15],\n","       [20, 25, 30],\n","       [35, 40, 45]])"]},"metadata":{},"execution_count":13}]},{"cell_type":"code","source":["# 2D array slicing\n","#[row,col]\n","\n","arr_2d[0:2,1:]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"2wEBV4oCAaNR","executionInfo":{"status":"ok","timestamp":1657742299487,"user_tz":-180,"elapsed":535,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"e3485d5c-c132-42ea-ae58-0cef1aa23ef9"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[10, 15],\n","       [25, 30]])"]},"metadata":{},"execution_count":15}]},{"cell_type":"code","source":["arr_2d[2]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"mV1DMdskAaPg","executionInfo":{"status":"ok","timestamp":1657742489388,"user_tz":-180,"elapsed":387,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"be15bf5e-1142-49dc-acd5-f4e1aa76a8ba"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([35, 40, 45])"]},"metadata":{},"execution_count":16}]},{"cell_type":"code","source":["arr_2d[2,:]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"_hwUOxecJy_x","executionInfo":{"status":"ok","timestamp":1657742519156,"user_tz":-180,"elapsed":1028,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"b9983b6f-6ac2-49bb-c615-e1686f8d295b"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([35, 40, 45])"]},"metadata":{},"execution_count":17}]},{"cell_type":"code","source":["arr_2d[:,1]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"iNwnD3ssJzJD","executionInfo":{"status":"ok","timestamp":1657742538547,"user_tz":-180,"elapsed":8,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"a03da045-d336-47f0-f68f-00715a523e26"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([10, 25, 40])"]},"metadata":{},"execution_count":18}]},{"cell_type":"code","source":["# convert 25 to 99\n","\n","arr_2d[1,1]=99\n","arr_2d"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"h4N6HvpUJzK5","executionInfo":{"status":"ok","timestamp":1657742572125,"user_tz":-180,"elapsed":534,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"eb9c67b3-df0f-417d-d9b4-d6cdf837ea11"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 5, 10, 15],\n","       [20, 99, 30],\n","       [35, 40, 45]])"]},"metadata":{},"execution_count":19}]},{"cell_type":"code","source":["# default dtype is int.look at the assigning of the float value.Not work\n","\n","arr_2d[1][1]=7.7\n","arr_2d"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"6LHbgkkCJzPD","executionInfo":{"status":"ok","timestamp":1657742611101,"user_tz":-180,"elapsed":365,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"e960c783-4c32-45aa-f078-5e2d9481f298"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 5, 10, 15],\n","       [20,  7, 30],\n","       [35, 40, 45]])"]},"metadata":{},"execution_count":21}]},{"cell_type":"markdown","source":["**Fancy Indexing**\n","\n","Fancy indexing allows you to select entire rows or columns out of order."],"metadata":{"id":"GfdYChlvKbqx"}},{"cell_type":"code","source":["v=np.arange(0,30,3)\n","v"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"_sY00JVuKaKS","executionInfo":{"status":"ok","timestamp":1657742715655,"user_tz":-180,"elapsed":44,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"4e75fbdb-031e-4b12-9467-30a10a4b4524"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 0,  3,  6,  9, 12, 15, 18, 21, 24, 27])"]},"metadata":{},"execution_count":22}]},{"cell_type":"code","source":["v[1]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"1sq_gbflKaOD","executionInfo":{"status":"ok","timestamp":1657742738273,"user_tz":-180,"elapsed":10,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"a6ae032d-502f-4365-f15e-df5a2370b3dc"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["3"]},"metadata":{},"execution_count":23}]},{"cell_type":"code","source":["v[7]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"zph_G6fpKaQ3","executionInfo":{"status":"ok","timestamp":1657742748293,"user_tz":-180,"elapsed":11,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"f4bb5b67-35f2-4a5c-fe25-35a9bb9ffa34"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["21"]},"metadata":{},"execution_count":24}]},{"cell_type":"code","source":["# we can select separate elements using their indices in a list\n","index_list=[1,3,7]\n","v[index_list]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"SSMhE-h7AaX4","executionInfo":{"status":"ok","timestamp":1657742824349,"user_tz":-180,"elapsed":318,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"b0cf18b0-1898-4476-9056-c47c5bdab481"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 3,  9, 21])"]},"metadata":{},"execution_count":25}]},{"cell_type":"code","source":["v[[1,3,7]]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"m0k-iOzfLKKC","executionInfo":{"status":"ok","timestamp":1657742882764,"user_tz":-180,"elapsed":364,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"4a2e94f7-8993-4fb3-f52f-13f425863137"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 3,  9, 21])"]},"metadata":{},"execution_count":26}]},{"cell_type":"code","source":["# Set up matrix\n","arr2d=np.zeros((10,10),dtype=int)\n","arr2d"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"Zwu9JrrILKNB","executionInfo":{"status":"ok","timestamp":1657742895707,"user_tz":-180,"elapsed":499,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"d7d2f9dd-55b7-4b16-8882-e99f66adcc49"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [0, 0, 0, 0, 0, 0, 0, 0, 0, 0]])"]},"metadata":{},"execution_count":27}]},{"cell_type":"code","source":["length_arr = arr2d.shape[0]\n","length_arr"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"xeo5DhQjLKPr","executionInfo":{"status":"ok","timestamp":1657743061578,"user_tz":-180,"elapsed":760,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"b76ceb78-a401-46a1-d6dc-d8242c0e37b8"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["10"]},"metadata":{},"execution_count":35}]},{"cell_type":"code","source":["arr2d[0]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"szRSMhIWLKWa","executionInfo":{"status":"ok","timestamp":1657742990681,"user_tz":-180,"elapsed":516,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"9f1fe319-113e-415e-f44f-60c03947e06a"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([0, 0, 0, 0, 0, 0, 0, 0, 0, 0])"]},"metadata":{},"execution_count":31}]},{"cell_type":"code","source":["#Set up array\n","for i in range(length_arr):\n","    arr2d[i]=i\n","    \n","arr2d"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"w1LN_DiwLKZp","executionInfo":{"status":"ok","timestamp":1657743061981,"user_tz":-180,"elapsed":5,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"c487c51d-1928-420b-f2b0-5990c9b6928d"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[0, 0, 0, 0, 0, 0, 0, 0, 0, 0],\n","       [1, 1, 1, 1, 1, 1, 1, 1, 1, 1],\n","       [2, 2, 2, 2, 2, 2, 2, 2, 2, 2],\n","       [3, 3, 3, 3, 3, 3, 3, 3, 3, 3],\n","       [4, 4, 4, 4, 4, 4, 4, 4, 4, 4],\n","       [5, 5, 5, 5, 5, 5, 5, 5, 5, 5],\n","       [6, 6, 6, 6, 6, 6, 6, 6, 6, 6],\n","       [7, 7, 7, 7, 7, 7, 7, 7, 7, 7],\n","       [8, 8, 8, 8, 8, 8, 8, 8, 8, 8],\n","       [9, 9, 9, 9, 9, 9, 9, 9, 9, 9]])"]},"metadata":{},"execution_count":36}]},{"cell_type":"code","source":["# we can select separate rows by indices in a list\n","arr2d[[2,4,6,8]]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"cpWktJm8L-Zj","executionInfo":{"status":"ok","timestamp":1657743137639,"user_tz":-180,"elapsed":547,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"6c81faa1-3ace-405e-9fd3-46687af6e479"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[2, 2, 2, 2, 2, 2, 2, 2, 2, 2],\n","       [4, 4, 4, 4, 4, 4, 4, 4, 4, 4],\n","       [6, 6, 6, 6, 6, 6, 6, 6, 6, 6],\n","       [8, 8, 8, 8, 8, 8, 8, 8, 8, 8]])"]},"metadata":{},"execution_count":37}]},{"cell_type":"markdown","source":["**any_array[[row , indices], [column , indices]]**"],"metadata":{"id":"vVTZay5vMYF-"}},{"cell_type":"code","source":["jj=np.arange(1,17).reshape(4,4)"],"metadata":{"id":"C9f9xkCBL-dD"},"execution_count":null,"outputs":[]},{"cell_type":"code","source":["jj"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"8qHj_IZIL-gP","executionInfo":{"status":"ok","timestamp":1657743211073,"user_tz":-180,"elapsed":9,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"541741f0-63b7-4fb4-e409-16bdaf9f97da"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 1,  2,  3,  4],\n","       [ 5,  6,  7,  8],\n","       [ 9, 10, 11, 12],\n","       [13, 14, 15, 16]])"]},"metadata":{},"execution_count":39}]},{"cell_type":"code","source":["# select separate values of 5 and 12\n","# row 1 and column 0. row 2 and column 3. \n","jj[[1,2],[0,3]]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"JId_MkxkL-jZ","executionInfo":{"status":"ok","timestamp":1657743254362,"user_tz":-180,"elapsed":338,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"01ac6c90-8856-4be9-f4c2-d2b4b9275095"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 5, 12])"]},"metadata":{},"execution_count":40}]},{"cell_type":"code","source":["# this time let's select separate values of 1, 10 and 16\n","jj[[0,2,3],[0,1,3]]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"2OVSHyKHL-oL","executionInfo":{"status":"ok","timestamp":1657743357339,"user_tz":-180,"elapsed":302,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"e9928c5e-58d2-4fc5-a7cd-70726cc1ad09"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 1, 10, 16])"]},"metadata":{},"execution_count":41}]},{"cell_type":"markdown","source":["**Using basic index and fancy index together**"],"metadata":{"id":"WppLPyoFNFky"}},{"cell_type":"code","source":["jj"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"8oVTkywYL-qv","executionInfo":{"status":"ok","timestamp":1657743378676,"user_tz":-180,"elapsed":351,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"226a5423-39db-493f-8f5b-9f7a329a1ff1"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 1,  2,  3,  4],\n","       [ 5,  6,  7,  8],\n","       [ 9, 10, 11, 12],\n","       [13, 14, 15, 16]])"]},"metadata":{},"execution_count":42}]},{"cell_type":"code","source":["jj[1,[1,3]]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"lxm5jS8xL-uW","executionInfo":{"status":"ok","timestamp":1657743411478,"user_tz":-180,"elapsed":294,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"db3eaeb1-6759-4944-850e-fb665cade788"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([6, 8])"]},"metadata":{},"execution_count":43}]},{"cell_type":"code","source":["jj[[0,3],[1]]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"iElKd9lrNRFM","executionInfo":{"status":"ok","timestamp":1657743473902,"user_tz":-180,"elapsed":315,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"ce91beba-28c4-46e3-be61-a4009cf388de"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 2, 14])"]},"metadata":{},"execution_count":44}]},{"cell_type":"markdown","source":["**Using basic slicing and fancy index together**"],"metadata":{"id":"YuDRWCFrNhgx"}},{"cell_type":"code","source":["jj"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"TxABIZKhNRL_","executionInfo":{"status":"ok","timestamp":1657743507619,"user_tz":-180,"elapsed":297,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"12c39572-192b-4ae0-f07d-5a50ce41c518"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 1,  2,  3,  4],\n","       [ 5,  6,  7,  8],\n","       [ 9, 10, 11, 12],\n","       [13, 14, 15, 16]])"]},"metadata":{},"execution_count":45}]},{"cell_type":"code","source":["jj[:,[1,2]]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"jpHRzqapNROE","executionInfo":{"status":"ok","timestamp":1657743539865,"user_tz":-180,"elapsed":320,"user":{"displayName":"Humeyra 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11]])"]},"metadata":{},"execution_count":49}]},{"cell_type":"code","source":["jj[1:3,1:3]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"gKBRAu7wOSB6","executionInfo":{"status":"ok","timestamp":1657743857004,"user_tz":-180,"elapsed":6,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"4b5d3e5c-b2be-42eb-d68f-9973c8f19a23"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([[ 6,  7],\n","       [10, 11]])"]},"metadata":{},"execution_count":50}]},{"cell_type":"markdown","source":["# **Selection on a Condition**"],"metadata":{"id":"AD3SuvR1PBhS"}},{"cell_type":"code","source":["arr = np.arange(1,11)\n","arr"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"1hQuRXCXOSEV","executionInfo":{"status":"ok","timestamp":1657743913061,"user_tz":-180,"elapsed":436,"user":{"displayName":"Humeyra 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True])"]},"metadata":{},"execution_count":52}]},{"cell_type":"code","source":["boolarr=arr>4"],"metadata":{"id":"w5YcBEvZOSNl"},"execution_count":null,"outputs":[]},{"cell_type":"code","source":["arr[boolarr]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"8itSxvU8PYXG","executionInfo":{"status":"ok","timestamp":1657743979903,"user_tz":-180,"elapsed":297,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"00298ed5-aabd-428f-e0c7-f0e1745413c8"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 5,  6,  7,  8,  9, 10])"]},"metadata":{},"execution_count":54}]},{"cell_type":"code","source":["arr[arr>4]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"sdDctVAlPYbq","executionInfo":{"status":"ok","timestamp":1657743991122,"user_tz":-180,"elapsed":513,"user":{"displayName":"Humeyra 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(arr!=4)]"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"oi4jH-hlPism","executionInfo":{"status":"ok","timestamp":1657744035171,"user_tz":-180,"elapsed":18,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"53b3b372-369d-494f-ab4c-8f313d15a925"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 1,  2,  5,  6,  7,  8,  9, 10])"]},"metadata":{},"execution_count":57}]},{"cell_type":"markdown","source":["# **Broadcasting**\n","Numpy arrays differ from a normal Python list because of their ability to broadcast."],"metadata":{"id":"C56a3lYiPzoQ"}},{"cell_type":"code","source":["#Setting a value with index range (Broadcasting)\n","\n","arr[:5]=77\n","arr"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"uTjIMhzqPixm","executionInfo":{"status":"ok","timestamp":1657744156057,"user_tz":-180,"elapsed":606,"user":{"displayName":"Humeyra 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10]"]},"metadata":{},"execution_count":61}]},{"cell_type":"code","source":["arr=np.arange(0,11)\n","arr"],"metadata":{"id":"lZ7Cua8UQVnF","colab":{"base_uri":"https://localhost:8080/"},"executionInfo":{"status":"ok","timestamp":1657744531659,"user_tz":-180,"elapsed":307,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"10bdd3ea-e888-4119-eb7e-0ece6004aefa"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10])"]},"metadata":{},"execution_count":62}]},{"cell_type":"code","source":["slice_of_arr=arr[0:6]\n","slice_of_arr"],"metadata":{"id":"kz5N0FGVQVp4","colab":{"base_uri":"https://localhost:8080/"},"executionInfo":{"status":"ok","timestamp":1657744575563,"user_tz":-180,"elapsed":4,"user":{"displayName":"Humeyra 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DATA"],"metadata":{"id":"ErggXdKiQVxR","colab":{"base_uri":"https://localhost:8080/"},"executionInfo":{"status":"ok","timestamp":1657744714586,"user_tz":-180,"elapsed":293,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"5258b78f-2669-4371-884c-82804e33f0d9"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([99, 99, 99, 99, 99, 99,  6,  7,  8,  9, 10])"]},"metadata":{},"execution_count":68}]},{"cell_type":"code","source":["arr_copy = arr.copy()\n","arr_copy"],"metadata":{"id":"_coNfTVRQVzH","colab":{"base_uri":"https://localhost:8080/"},"executionInfo":{"status":"ok","timestamp":1657744940032,"user_tz":-180,"elapsed":324,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"405330d3-1a03-4a63-ac44-b2e108157763"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([99, 99, 99, 99, 99, 99,  6,  7,  8,  9, 10])"]},"metadata":{},"execution_count":74}]},{"cell_type":"code","source":["# We can assign a list of values in an exact dimension\n","arr_copy[:6]=[0,1,2,3,4,5]"],"metadata":{"id":"WLGqHxUPQV3j"},"execution_count":null,"outputs":[]},{"cell_type":"code","source":["arr_copy"],"metadata":{"id":"fAE9kQ8mQV65","colab":{"base_uri":"https://localhost:8080/"},"executionInfo":{"status":"ok","timestamp":1657744944709,"user_tz":-180,"elapsed":426,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"5bc156d6-7077-465b-c172-11d19130884d"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([ 0,  1,  2,  3,  4,  5,  6,  7,  8,  9, 10])"]},"metadata":{},"execution_count":76}]},{"cell_type":"code","source":["arr"],"metadata":{"id":"kt3UA0c9QV9P","colab":{"base_uri":"https://localhost:8080/"},"executionInfo":{"status":"ok","timestamp":1657744782357,"user_tz":-180,"elapsed":285,"user":{"displayName":"Humeyra 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(e^)\n","np.exp(arr)"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"PMQ-FHePUKzQ","executionInfo":{"status":"ok","timestamp":1657745279564,"user_tz":-180,"elapsed":453,"user":{"displayName":"Humeyra Armutlu","userId":"12643211298338865125"}},"outputId":"c3e91ead-e4c8-43d7-e8e0-22a7c342637d"},"execution_count":null,"outputs":[{"output_type":"execute_result","data":{"text/plain":["array([1.00000000e+00, 2.71828183e+00, 7.38905610e+00, 2.00855369e+01,\n","       5.45981500e+01, 1.48413159e+02, 4.03428793e+02, 1.09663316e+03,\n","       2.98095799e+03, 8.10308393e+03])"]},"metadata":{},"execution_count":94}]},{"cell_type":"code","source":["np.max(arr)   # same as arr.max()"],"metadata":{"colab":{"base_uri":"https://localhost:8080/"},"id":"MyVhkcMiUY0f","executionInfo":{"status":"ok","timestamp":1657745323326,"user_tz":-180,"elapsed":369,"user":{"displayName":"Humeyra 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