{"id":212,"date":"2022-06-23T14:29:59","date_gmt":"2022-06-23T05:29:59","guid":{"rendered":"https:\/\/kinako-simulation.com\/?p=212"},"modified":"2023-02-19T17:01:53","modified_gmt":"2023-02-19T08:01:53","slug":"numpy%e3%81%ae%e9%85%8d%e5%88%97%e3%82%af%e3%82%a4%e3%82%ba3","status":"publish","type":"post","link":"https:\/\/kinako-simulation.com\/?p=212","title":{"rendered":"Numpy\u306e\u914d\u5217\u30af\u30a4\u30ba3"},"content":{"rendered":"\n

\u30af\u30a4\u30ba\u306b\u6311\u6226\u3057\u3066\u3001Numpy\u306e\u914d\u5217\u3092\u3082\u3063\u3068\u77e5\u308d\u3046\uff01\u7b2c3\u5f3e\u3060\u3088\u3002<\/p>\n\n\n\n

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\u4eca\u65e5\u306f\u30012\u6b21\u5143\u914d\u5217\u3092\u304a\u52c9\u5f37\u3059\u308b\u3088\u3002\u6700\u5f8c\u306b\u30af\u30a4\u30ba\u304c\u3042\u308b\u304b\u3089\u3001\u6311\u6226\u3057\u3066\u307f\u3066\u306d\u3002<\/p>

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\u3088\u30fc\u3057\u3001\u9811\u5f35\u308b\u305e\u30fc\u3002<\/p>

<\/div><\/div><\/div>\n\n\n\n

1\u6b21\u5143\u914d\u5217\u306e\u4f8b\u3068\u3057\u3066\u30010\u304b\u30899\u306e\u6574\u6570\u306e\u96c6\u307e\u308a\u3092\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4f5c\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3057\u305f\u3002<\/p>\n\n\n\n

import numpy as np\narr1d=np.arange(10)\nprint(arr1d)<\/code><\/pre><\/div>\n\n\n\n
\u5b9f\u884c\u3057\u305f\u6642\u306e\u7b54\u3048\u306f\u3001<\/p>\n\n\n\n
[0 1 2 3 4 5 6 7 8 9]<\/code><\/pre>\n\n\n\n
\u3068\u306a\u308a\u307e\u3059\u3002\u3053\u308c\u3092[0 1 2 3 4] \u3068 [5 6 7 8 9]\u306b\u5206\u3051\u3066\u30012\u6b21\u5143\u914d\u5217\u3092\u4f5c\u3063\u3066\u307f\u307e\u3059\u3002\u914d\u5217\u306e\u5f62\u3092\u5909\u3048\u308b\u306b\u306f\u3001reshape\u3092\u4f7f\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
arr2d=arr1d.reshape(2,5)\nprint(arr2d)<\/code><\/pre><\/div>\n\n\n\n
[[0 1 2 3 4]
[5 6 7 8 9]]<\/code><\/pre>\n\n\n\n
2\u6b21\u5143\u914d\u5217\u306e1\u884c\u76ee(axis=0)\u3092\u8868\u793a\u3057\u305f\u3044\u6642\u306b\u306f\u3001arr2d[0]\u3068\u6307\u5b9a\u3057\u307e\u3059\u3002<\/p>\n\n\n\n
print(arr2d[0])<\/code><\/pre><\/div>\n\n\n\n
[0 1 2 3 4]<\/code><\/pre>\n\n\n\n
[0 1 2 3 4]\u306e\u3046\u3061\u3001\u771f\u3093\u4e2d\u306e[1 2 3]\u3092\u629c\u304d\u53d6\u308a\u305f\u3044\u6642\u306b\u306f\u3001arr2d[0,1:4]\u3068\u3057\u307e\u3059\u30021:4\u306e\u3088\u3046\u306b\u914d\u5217\u3092\u5207\u308a\u53d6\u308b\u3053\u3068\u3092\u30b9\u30e9\u30a4\u30b7\u30f3\u30b0\u3068\u8a00\u3044\u307e\u3059\u3002<\/p>\n\n\n\n
print(arr2d[0,1:4])<\/code><\/pre><\/div>\n\n\n\n
[1 2 3]<\/code><\/pre>\n\n\n\n
<\/div>
\u98df\u30d1\u30f3\u306e\u30b9\u30e9\u30a4\u30b9\u307f\u305f\u3044\u3060\u306d\u3002<\/p>
<\/div><\/div><\/div>\n\n\n\n
<\/div>
\u305d\u3046\u3060\u306d\u3002\u3061\u306a\u307f\u306b\u3001arr2d[:,1:4]\u306b\u3059\u308b\u3068\u30011\u5217\u76ee\u30682\u5217\u76ee\u306e\u4e21\u65b9\u304b\u3089\u30b9\u30e9\u30a4\u30b9\u3067\u304d\u308b\u3088\u3002<\/p>
<\/div><\/div><\/div>\n\n\n\n
print(arr2d[:,1:4])<\/code><\/pre><\/div>\n\n\n\n
[[1 2 3]
[6 7 8]]<\/code><\/pre>\n\n\n\n
<\/div>
\u3053\u306e\u51e6\u7406\u306f\u3001\u30c7\u30fc\u30bf\u306e\u5408\u8a08\u3068\u304b\u3092\u51fa\u3059\u6642\u306b\u3001\u4fbf\u5229\u306a\u3093\u3060\u3088\u3002\u4f8b\u3048\u3070\u3001\u5de6\u306e4\u5217\u306e\u548c\u3092\u4e00\u756a\u53f3\u306e\u5217\u306b\u8a08\u7b97\u3057\u305f\u3044\u6642\u306b\u306f\u3001\u6b21\u306e\u3088\u3046\u306b\u66f8\u304f\u3088\u3002<\/p>
<\/div><\/div><\/div>\n\n\n\n
arr2d[:,4]=arr2d[:,:4].sum(1)\nprint(arr2d)<\/code><\/pre><\/div>\n\n\n\n
[[ 0 1 2 3 6]
[ 5 6 7 8 26]]<\/code><\/pre>\n\n\n\n
<\/div>
0+1+2+3=6
5+6+7+8=26
\u3068\u3044\u3046\u610f\u5473\u3060\u306d\u3002<\/p>
<\/div><\/div><\/div>\n\n\n\n
<\/div>
\u305d\u306e\u901a\u308a\u3060\u3088\u3001\u304d\u306a\u3053\u3061\u3083\u3093\u3002\u3053\u306e\u30d7\u30ed\u30b0\u30e9\u30e0\u3092\u7701\u7565\u305b\u305a\u306b\u3001\u4e01\u5be7\u306b\u66f8\u304f\u3068\u3001
arr2d[0:2,4]=arr2d[0:2,0:4].sum(axis=1)
\u3068\u306a\u308b\u3088\u3002<\/p>
<\/div><\/div><\/div>\n\n\n\n
\u30c7\u30fc\u30bf\u306f2\u884c\u3057\u304b\u306a\u3044\u306e\u3067\u3001\u300c0:2\u300d\u306e\u90e8\u5206\u306f\u300c:\u300d\u306b\u7701\u7565\u3067\u304d\u307e\u3059\u3002\u300c0:4\u300d\u306e\u90e8\u5206\u30820\u3092\u7701\u7565\u3057\u3066\u300c:4\u300d\u306b\u3067\u304d\u3001\u300csum(axis=1)\u300d\u306f\u300csum(1)\u300d\u306b\u7701\u7565\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\t\t\r\n\t\t\t\r\n\r\n\t\t