本文的目的是记录meshgrid()的理解过程: step1. 通过一个示例引入创建网格点矩阵; step2. 基于步骤1，说明meshgrid()的作用; step3. 详细解读meshgrid()的官网定义; 说明:step1和2 的数据都是基于笛卡尔坐标系的矩阵，目的是为了方便讨论。 step Read More
posted @ 2018-06-15 13:44
suonikeyinsu
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numpy.ravel(a, order='C') Return a flattened array numpy.chararray.flatten(order='C') Return a copy of the array collapsed into one dimension numpy.sq Read More
posted @ 2018-06-14 16:34
suonikeyinsu
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pilow的基本操作 基于pilow生成验证码 Read More
posted @ 2018-06-07 12:19
suonikeyinsu
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1.1 通俗的理解: 统计学讲回归 就是一堆数据画到一个画像上,实际上有一个真实图像 但是你从数据得到的图像和真实的图像不一致，通过数据越来越多，图像就回到了真实的图像了，这就是回归。 通过观察使得认知接近真值的过程 回归本源 在我们认知（测量）这个世界的时候，我们并不能得到这个世界的全部信息（真值 Read More
posted @ 2018-06-06 20:04
suonikeyinsu
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tf.constant Creates a constant tensor. The resulting tensor is populated with values of type dtype, as specified by arguments value and (optionally) s Read More
posted @ 2018-05-30 23:37
suonikeyinsu
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Class Variable A variable maintains state in the graph across calls to run(). You add a variable to the graph by constructing an instance of the class Read More
posted @ 2018-05-29 22:59
suonikeyinsu
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tf.placeholder Inserts a placeholder for a tensor that will be always fed. Important: This tensor will produce an error if evaluated. Its value must b Read More
posted @ 2018-05-29 21:50
suonikeyinsu
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list comprehension Using a list comprehension: [x for x in iterable] to create list instance [expresion for x in iterabel ] 列表推导式的核心在expression. 列表推推导 Read More
posted @ 2018-05-29 20:51
suonikeyinsu
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class numpy.random.RandomState(seed=None) RandomState 是一个基于Mersenne Twister算法的伪随机数生成类 RandomState 包含很多生成 概率分布的伪随机数 的方法。 如果指定seed值，那么每次生成的随机数都是一样的。即对于某 Read More
posted @ 2018-05-29 13:16
suonikeyinsu
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The sqlite3 module supports two kinds of placeholders: question marks (qmark style) and named placeholders (named style). execute(sql[, parameters]) s Read More
posted @ 2018-05-27 16:56
suonikeyinsu
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