{"id":76372,"date":"2018-10-16T19:06:06","date_gmt":"2018-10-16T10:06:06","guid":{"rendered":"https:\/\/www.sejuku.net\/blog\/?p=76372"},"modified":"2024-05-06T11:52:59","modified_gmt":"2024-05-06T02:52:59","slug":"numpy","status":"publish","type":"post","link":"https:\/\/www.sejuku.net\/blog\/76372","title":{"rendered":"\u307e\u305a\u306f\u3053\u3053\u304b\u3089\uff01NumPy\u306e\u4f7f\u3044\u65b9\u3092\u57fa\u790e\u306e\u57fa\u790e\u304b\u3089\u89e3\u8aac"},"content":{"rendered":"

\u3053\u306e\u8a18\u4e8b\u3067\u306f\u4f8d\u3067\u7d39\u4ecb\u3057\u3066\u308bNumPy\u306e\u4f7f\u3044\u65b9\u306b\u95a2\u3059\u308b\u8a18\u4e8b\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002NumPy\u306e\u4f7f\u3044\u65b9\u3092\u5b66\u3076\u306b\u306f\u5165\u9580\u66f8\u306a\u3069\u3092\u4f7f\u3046\u306e\u304c\u4e00\u756a\u3067\u3059\u304c\u3001\u308f\u304b\u3089\u306a\u3044\u3053\u3068\u304c\u51fa\u3066\u304d\u305f\u3068\u304d\u306a\u3069\u306f\u30b5\u30af\u30c3\u3068\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u8abf\u3079\u308b\u306e\u304c\u4fbf\u5229\u3067\u3059\u3002<\/p>\n

\u7ae0\u7acb\u3066\u3066\u8a18\u4e8b\u3068\u305d\u306e\u5185\u5bb9\u3092\u7d39\u4ecb\u3057\u3066\u3044\u308b\u306e\u3067\u3001\u662f\u975e\u53c2\u8003\u306b\u3057\u3066\u4e0b\u3055\u3044\u3002<\/p>\n

NumPy\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb<\/h2>\n \n
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\u3010NumPy\u521d\u5fc3\u8005\u5fc5\u898b\u3011NumPy\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u65b9\u6cd5\u307e\u3068\u3081\u307e\u3057\u305f\uff01<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

pip\/conda\u306a\u3069\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u7ba1\u7406\u30bd\u30d5\u30c8\u3092\u4f7f\u3063\u305fNumPy\u306e\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002\u307e\u305a\u306f\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3092\u7d42\u308f\u3089\u305b\u3066\u304b\u3089\u52c9\u5f37\u3092\u59cb\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u64cd\u4f5c<\/h2>\n

NumPy\u306b\u306fndarray\u3068\u3044\u3046\u914d\u5217\u578b\u304c\u3042\u308a\u307e\u3059\u3002\u3053\u306endarray\uff08np.array\u3068\u3082\uff09\u3092\u4f7f\u3046\u3053\u3068\u3067\u9ad8\u901f\u306a\u8a08\u7b97\u304c\u53ef\u80fd\u306b\u306a\u308a\u307e\u3059\u3002\u307e\u305a\u306f\u914d\u5217\u306e\u4f5c\u308a\u65b9\u3092\u899a\u3048\u307e\u3057\u3087\u3046\u3002<\/p>\n

\u914d\u5217\u306e\u521d\u671f\u5316<\/h3>\n \n
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\u3010NumPy\u5165\u9580 np.zeros\u30110\u3067\u521d\u671f\u5316\u3057\u305f\u914d\u5217\u3092\u4f5c\u308bzeros\u95a2\u6570\u306e\u4f7f\u3044\u65b9<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

np.zeros\u306b\u3088\u308b\u914d\u5217\u306e\u8981\u7d20\u30920\u3067\u521d\u671f\u5316<\/b>\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n \n

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\u3010Numpy\u5165\u9580 np.ones\u3011\u914d\u5217\u306e\u5168\u8981\u7d20\u30921\u3067\u521d\u671f\u5316\u3059\u308bones\u95a2\u6570\u306e\u4f7f\u3044\u65b9<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

np.ones\u306b\u3088\u308b\u914d\u5217\u306e\u8981\u7d20\u30921\u3067\u521d\u671f\u5316<\/b>\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n \n

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\u3010NumPy\u5165\u9580 np.arange\u3011\u7b49\u5dee\u6570\u5217\uff081,3,5,7..\uff09\u3092\u751f\u6210\u3059\u308barange\u95a2\u6570<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

np.arange\u3068\u3044\u3046numpy\u7248range\u95a2\u6570\u306e\u7d39\u4ecb\u3067\u3059\u3002<\/p>\n \n

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\u3010NumPy\u5165\u9580 np.linspace\u3011\u7b49\u5dee\u6570\u5217\u3092\u4f5c\u6210\u3059\u308b\u95a2\u6570<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

np.linspace\u3068\u3044\u3046\u59cb\u70b9\u3068\u7d42\u70b9\u3092\u6c7a\u3081\u305f\u3068\u304d\u306b\u7b49\u9593\u9694\u306e\u6570\u5217\u3092\u4f5c\u3063\u3066\u304f\u308c\u308b\u95a2\u6570\u306e\u7d39\u4ecb\u3067\u3059\u3002<\/p>\n \n

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\u3010NumPy\u5165\u9580 np.empty\u3011\u8981\u7d20\u3092\u521d\u671f\u5316\u305b\u305a\u306b\u65b0\u3057\u3044\u914d\u5217\u3092\u4f5c\u308b<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u521d\u671f\u5316\u305b\u305a\u306b\u914d\u5217\u3092\u4f5c\u6210\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/p>\n

\u4e71\u6570<\/h3>\n

np.random\u30e2\u30b8\u30e5\u30fc\u30eb\u5185\u306e\u95a2\u6570\u306e\u7d39\u4ecb\u3067\u3059\u3002<\/p>\n

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\u3010Numpy\u5165\u9580 np.random.randint\u3011\u3044\u308d\u3093\u306a\u30b5\u30a4\u30b3\u30ed\u304c\u4f5c\u308c\u308brandint<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.random.normal\u3011\u6b63\u898f\u5206\u5e03\u306b\u5f93\u3046\u4e71\u6570\u306e\u4f5c\u308a\u65b9\uff01<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n <\/p>\n

\u914d\u5217\u306e\u64cd\u4f5c<\/h2>\n

\u30bd\u30fc\u30c8\uff08\u4e26\u3079\u66ff\u3048\uff09\u3084\u914d\u5217\u306e\u5f62\u72b6\u3092\u5909\u3048\u308b\u64cd\u4f5c\u3067\u3059\u3002<\/p>\n \n

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\u3010NumPy\u5165\u9580 np.sort\u3011\u914d\u5217\u3092\u6607\u9806\u306b\u30bd\u30fc\u30c8\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u5b66\u307c\u3046<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n \n
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\u3010NumPy\u5165\u9580 np.ndarray.flatten\u3011\u591a\u6b21\u5143\u914d\u5217\u3092\u4e00\u6b21\u5143\u914d\u5217\u306b\u3057\u3066\u307f\u3088\u3046<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n \n
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\u3010NumPy\u5165\u9580 np.reshape\u3011\u914d\u5217\u306e\u5f62\u3092\u5909\u3048\u308b\u65b9\u6cd5 flatten\u306e\u4ee3\u7528\u306b\u3082\uff01<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n \n
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\u3010NumPy\u5165\u9580 np.transpose\u3011\u914d\u5217\u306e\u8ef8\u3092\u53d6\u308a\u66ff\u3048\u308b\/\u884c\u5217\u306e\u8ee2\u7f6e\u306e\u65b9\u6cd5<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u914d\u5217\u306e\u7d50\u5408<\/h3>\n

\u914d\u5217\u540c\u58eb\u306e\u7d50\u5408\u306a\u3069\u3092\u884c\u3046\u95a2\u6570\u3067\u3059\u3002<\/p>\n \n

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\u3010NumPy\u5165\u9580 np.append\u3011\u914d\u5217\u672b\u5c3e\u306b\u8981\u7d20\u3092\u8ffd\u52a0\u3059\u308bappend\u95a2\u6570<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n \n
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\u3010Numpy\u5165\u9580 np.concatenate\u3011\u914d\u5217\u540c\u58eb\u306e\u7d50\u5408\u64cd\u4f5c\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3088\u3046\uff01<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n \n
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\u3010NumPy\u5165\u9580 np.vstack\u3011vstack\/hstack\u3067\u81ea\u7531\u81ea\u5728\u306b\u914d\u5217\u540c\u58eb\u3092\u7d50\u5408\uff01<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u914d\u5217\u306b\u5bfe\u3059\u308b\u4e3b\u306a\u6f14\u7b97<\/h2>\n

\u56db\u5247\u6f14\u7b97<\/h3>\n

\u307e\u305a\u306f\u4e00\u756a\u7c21\u5358\u306a\u6f14\u7b97\u3092\u3084\u3063\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/p>\n \n

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\u3010Python\u5165\u9580\u3011numpy\u3067\u8a08\u7b97\u3092\u3057\u3066\u307f\u3088\u3046<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u884c\u5217\u6f14\u7b97<\/h3>\n

\u5185\u7a4d\u306f\u6a5f\u68b0\u5b66\u7fd2\u306e\u5b9f\u88c5\u306b\u6b20\u304b\u305b\u306a\u3044\u6f14\u7b97\u3067\u3059\u3002<\/p>\n \n

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\u3010NumPy\u5165\u9580 np.dot\u3011\u884c\u5217\u8a08\u7b97\u306e\u57fa\u790e\uff01np.dot\u3067\u306e\u5185\u7a4d\u8a08\u7b97\u306e\u4ed5\u65b9\uff01<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u5408\u8a08\u30fb\u6a19\u6e96\u504f\u5dee\u306a\u3069\u306e\u8a08\u7b97<\/h3>\n

\u4ee3\u8868\u5024\u3092\u8a08\u7b97\u3059\u308b\u69d8\u3005\u306a\u65b9\u6cd5\u3092\u7d39\u4ecb\u3057\u307e\u3059\u3002<\/p>\n

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\u3010NumPy\u5165\u9580 np.sum\u3011\u8981\u7d20\u306e\u548c\u3092\u6c42\u3081\u308bnp.sum\u95a2\u6570\u3068arr.sum\u30e1\u30bd\u30c3\u30c9<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.mean\u3011\u914d\u5217\u306e\u8981\u7d20\u306e\u5e73\u5747\u3092\u6c42\u3081\u308b\u65b9\u6cd5<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.min\u3011\u914d\u5217\u306e\u8981\u7d20\u304b\u3089\u6700\u5c0f\u5024\u3092\u53d6\u308a\u51fa\u3059\u65b9\u6cd5<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.max\u3011\u6700\u5927\u5024\u3092\u53d6\u308a\u51fa\u3059np.max,np.nanmax,np.maximum<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n <\/p>\n

\u914d\u5217\u306e\u8981\u7d20\u5168\u4f53\u3092\u5909\u3048\u308b\u64cd\u4f5c<\/h3>\n

\u5bfe\u6570\u3001\u56db\u6368\u4e94\u5165\u3001\u7d76\u5bfe\u5024\u306a\u3069\u3001\u914d\u5217\u306e\u3059\u3079\u3066\u306e\u8981\u7d20\u306b\u5bfe\u3057\u3066\u9069\u7528\u3055\u308c\u308b\u95a2\u6570\u3067\u3059\u3002<\/p>\n

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\u3010NumPy\u5165\u9580 np.log\u3011np.array\u306e\u5bfe\u6570\u3092\u8a08\u7b97\u3059\u308b\u95a2\u65704\u3064\u3092\u7d39\u4ecb<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.round\u3011\u914d\u5217\u306e\u8981\u7d20\u3092\u56db\u6368\u4e94\u5165\u3059\u308b\u65b9\u6cd5\u3068\u30010.5\u306f0\u304b1\u304b\u554f\u984c<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n
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\u3010NumPy\u5165\u9580 np.abs\u3011\u914d\u5217\u8981\u7d20\u306e\u7d76\u5bfe\u5024\u3092\u53d6\u308babs\u95a2\u6570\u3092\u4f7f\u3063\u3066\u307f\u3088\u3046<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n <\/p>\n

\u81ea\u4f5c\u30e6\u30cb\u30d0\u30fc\u30b5\u30eb\u95a2\u6570<\/h3>\n

NumPy\u306b\u306a\u3044\u95a2\u6570\u3092\u7c21\u5358\u306b\u5b9f\u88c5\u3059\u308b\u6a5f\u80fd\u306e\u7d39\u4ecb\u3067\u3059\u3002<\/p>\n \n

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\u3010NumPy\u5165\u9580\u3011np.vectorize\u3067Python\u95a2\u6570\u3092\u7c21\u5358\u306b\u30e6\u30cb\u30d0\u30fc\u30b5\u30eb\u95a2\u6570\u5316!<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n \n

\u30d5\u30a1\u30a4\u30eb\u306e\u8aad\u307f\u66f8\u304d<\/h2>\n

\u5b9f\u9a13\u7d50\u679c\u306a\u3069\u3092CSV\u30d5\u30a1\u30a4\u30eb\u306a\u3069\u306b\u66f8\u304d\u8fbc\u3093\u3067\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5\u3084\u3001\u9006\u306b\u30d5\u30a1\u30a4\u30eb\u304b\u3089\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u3053\u3080\u64cd\u4f5c\u3067\u3059\u3002<\/p>\n

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\u3010NumPy\u5165\u9580\u3011NumPy\u306b\u3088\u308bCSV\u306e\u8aad\u307f\u8fbc\u307f\/\u66f8\u304d\u8fbc\u307f\u3092\u30de\u30b9\u30bf\u30fc\u3057\u3088\u3046\uff01<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.save\u3011\u914d\u5217\u3092\u30d5\u30a1\u30a4\u30eb\u306b\u4fdd\u5b58\u3059\u308bnp.save\u3092\u4f7f\u3044\u3053\u306a\u3059<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.savetxt\u3011\u30d5\u30a1\u30a4\u30eb(csv\/tsv)\u304b\u3089\u30c7\u30fc\u30bf\u3092\u4fdd\u5b58\u3059\u308b\u65b9\u6cd5<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n
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\u3010NumPy\u5165\u9580 np.loadtxt\u3011\u30d5\u30a1\u30a4\u30eb(csv\/tsv)\u304b\u3089\u30c7\u30fc\u30bf\u3092\u8aad\u307f\u8fbc\u3080\u65b9\u6cd5<\/div>\n
\u66f4\u65b0\u65e5\uff1a2024\u5e745\u67086\u65e5<\/div>\n <\/div>\n <\/div>\n <\/div>\n <\/a>\n <\/p>\n

\u307e\u3068\u3081<\/h2>\n

NumPy\u306b\u306f\u3053\u3053\u3067\u7d39\u4ecb\u3057\u304d\u308c\u306a\u304b\u3063\u305f\u69d8\u3005\u306a\u6a5f\u80fd\u304c\u3042\u308a\u307e\u3059\u304c\u3001\u307e\u305a\u306f\u5165\u9580\u66f8\u306a\u3069\u3067\u4f53\u7cfb\u7684\u306b\u52c9\u5f37\u3059\u308b\u3053\u3068\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\u3002NumPy\u3092\u4f7f\u3048\u3070Python\u3067\u3082\u52b9\u7387\u7684\u306a\u79d1\u5b66\u8a08\u7b97\u306e\u5b9f\u88c5\u304c\u53ef\u80fd\u3067\u3059\u3002\u662f\u975e\u4f7f\u3044\u65b9\u3092\u899a\u3048\u3066\u5f79\u7acb\u3066\u3066\u304f\u3060\u3055\u3044\u3002
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