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字符串abs —— 输出字符串ascii码strvcat —— 把多个字符串横向连接成长字符串fprintf —— 把格式化的文本写到文件中或显示屏上int2str —— 整数转换成字符串num2str —— 数字转换成字符串sprintf —— 用格式控制，数字转换成字符串eval —— 作为一个... 阅读全文
posted @ 2014-09-18 20:30
老姨
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VectorizationVectorization refers to a powerful way to speed up your algorithms. Numerical computing and parallel computing researchers have put decad... 阅读全文
posted @ 2014-09-18 16:18
老姨
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Gradient checking and advanced optimizationIn this section, we describe a method for numerically checking the derivatives computed by your code to mak... 阅读全文
posted @ 2014-09-18 15:18
老姨
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Neural NetworksWe will use the following diagram to denote a single neuron:This "neuron" is a computational unit that takes as input x1,x2,x3 (and a +... 阅读全文
posted @ 2014-09-18 10:41
老姨
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