{"id":8532,"date":"2023-03-17T16:38:02","date_gmt":"2023-03-17T07:38:02","guid":{"rendered":"https:\/\/blogs.mathworks.com\/japan-community\/?p=8532"},"modified":"2023-03-17T16:38:02","modified_gmt":"2023-03-17T07:38:02","slug":"function-handles-are-faster-in-matlab-r2023a-jp","status":"publish","type":"post","link":"https:\/\/blogs.mathworks.com\/japan-community\/2023\/03\/17\/function-handles-are-faster-in-matlab-r2023a-jp\/","title":{"rendered":"MATLAB R2023a \u30a2\u30c3\u30d7\u30c7\u30fc\u30c8\uff1a\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u306e\u9ad8\u901f\u5316"},"content":{"rendered":"

\u203b\u3053\u306e\u6295\u7a3f\u306f 2023 \u5e74 3 \u6708 16 \u65e5\u306b The MATLAB blog (Mike Croucher<\/a>) \u306b\u6295\u7a3f<\/a>\u3055\u308c\u305f\u3082\u306e\u306e\u6284\u8a33\u3067\u3059\u3002<\/p>\n

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MathWorks \u304c MATLAB \u306e\u51e6\u7406\u901f\u5ea6\u3092\u4e0a\u3052\u308b\u65b9\u6cd5\u306f\u5927\u304d\u304f\u5206\u3051\u3066 2 \u3064\u3042\u308a\u307e\u3059\u3002\u500b\u3005\u306e\u95a2\u6570\u306b\u6f5c\u308a\u8fbc\u3093\u3067\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u3092\u9664\u53bb\u3057\u305f\u308a\u3001\u30a2\u30eb\u30b4\u30ea\u30ba\u30e0\u3092\u6539\u5584\u3057\u305f\u308a\u3059\u308b\u65b9\u6cd5\u3068\u3001MATLAB \u8a00\u8a9e\u81ea\u4f53\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u5411\u4e0a\u3055\u305b\u3066\u9ad8\u901f\u5316\u3059\u308b\u65b9\u6cd5\u3067\u3059\u3002<\/div>\n
\u4eca\u65e5\u306f\u3001R2023a \u30ea\u30ea\u30fc\u30b9\u3067\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u306e\u9ad8\u901f\u5316\u304c\u884c\u308f\u308c\u305f\u3001\u5f8c\u8005\u306e\u4f8b\u3092\u898b\u3066\u307f\u307e\u3057\u3087\u3046\u3002<\/div>\n
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 <\/p>\n

\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u3063\u3066\u4f55\uff1f<\/h1>\n
\u30c9\u30ad\u30e5\u30e1\u30f3\u30c8<\/a>\u304b\u3089\u305d\u306e\u307e\u307e\u5f15\u7528\u3059\u308b\u3068\u30fb\u30fb\u300c\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u306f\u3001\u95a2\u6570\u3092\u8868\u3059 MATLAB\u00ae<\/sup>\u00a0\u30c7\u30fc\u30bf\u578b\u3067\u3059\u3002\u4e00\u822c\u306b\u3001\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u306f\u95a2\u6570\u3092\u5225\u306e\u95a2\u6570\u306b\u6e21\u3059\u305f\u3081\u306b\u4f7f\u7528\u3057\u307e\u3059\u3002\u305f\u3068\u3048\u3070\u3001\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u306f\u3001\u6240\u5b9a\u306e\u5024\u306e\u7bc4\u56f2\u306b\u5bfe\u3057\u3066\u6570\u5f0f\u3092\u8a55\u4fa1\u3059\u308b\u95a2\u6570\u306e\u5165\u529b\u5f15\u6570\u3068\u3057\u3066\u4f7f\u7528\u3067\u304d\u307e\u3059\u3002\u300d<\/div>\n
\u4f8b\u3048\u3070\u3001\u3053\u3093\u306a\u95a2\u6570\u304c\u3042\u3063\u305f\u3068\u3057\u307e\u3059\u3002<\/div>\n
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function <\/span>y = computeSquare(x)<\/span><\/div>\n
y = x.^2;<\/span><\/div>\n
end<\/span><\/span><\/div>\n<\/div>\n
\u3053\u306e\u95a2\u6570\u306b\u305f\u3044\u3057\u3066\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u3092\u4f5c\u3063\u3066\u3001<\/div>\n
\n
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f = @computeSquare<\/span><\/div>\n
\n
\n
\n
\u5024\u3092\u3082\u3064 f = function_handle:<\/span><\/span><\/div>\n
@computeSquare<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n
4 \u306e\u4e8c\u4e57\u3092\u3053\u3093\u306a\u611f\u3058\u3067\u8a08\u7b97\u3067\u304d\u307e\u3059\u3002<\/div>\n
\n
\n
b = f(4)<\/span><\/div>\n
\n
b = 16<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\u3053\u306e\u300c\u305d\u308c\u304c\u3069\u3046\u3057\u305f\u30fb\u30fb\u300d\u7684\u306b\u898b\u3048\u308b\u6a5f\u80fd\u306f\u975e\u5e38\u306b\u4fbf\u5229\u3067\u3001MATLAB \u30b3\u30fc\u30c9\u306e\u3044\u305f\u308b\u3068\u3053\u308d\u3067\u4f7f\u308f\u308c\u3066\u3044\u308b\u306e\u3092\u898b\u304b\u3051\u308b\u3068\u601d\u3044\u307e\u3059\u3002<\/div>\n
<\/div>\n

 <\/p>\n

\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u306e\u901f\u5ea6\u30c1\u30a7\u30c3\u30af<\/h1>\n
\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u3092\u4f7f\u3063\u3066\u3001\u7d50\u679c\u3092\u4fdd\u5b58\u305b\u305a\u306b 1 \u5104\u500b\u306e\u6570\u5b57\u306e\u4e8c\u4e57\u3092\u8a08\u7b97\u3057\u3066\u307f\u307e\u3057\u3087\u3046\u3002\u7279\u306b\u610f\u5473\u306e\u306a\u3044\u8a08\u7b97\u3067\u3059\u304c\u3001R2023a \u3067\u95a2\u6570\u30cf\u30f3\u30c9\u30eb\u306e\u30aa\u30fc\u30d0\u30fc\u30d8\u30c3\u30c9\u304c\u5927\u5e45\u306b\u524a\u6e1b\u3055\u308c\u3066\u3044\u308b\u3053\u3068\u304c\u308f\u304b\u308a\u307e\u3059\u3002<\/div>\n
\n
\n
n = 1e8;<\/span><\/div>\n<\/div>\n
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tic<\/span><\/div>\n<\/div>\n
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for <\/span>i = 1:n<\/span><\/div>\n<\/div>\n
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out = f(i);<\/span><\/div>\n<\/div>\n
\n
end<\/span><\/span><\/div>\n<\/div>\n
\n
t = toc<\/span><\/div>\n
\n
t = 0.7665<\/div>\n<\/div>\n<\/div>\n<\/div>\n
\u79c1\u306e PC \u3067\u306f\u3053\u3093\u306a\u7d50\u679c\u3067\u3057\u305f\u3002<\/div>\n