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PCA 在手写数字数据集上的应用
在 skilearn 的手写数据集中,每个数据点都是 0 到 9 之间手写数字的一张 8*8 灰度图像。用 PCA 将其降维到二维,并可视化数据点,如下: 1、digits 数据演示: from sklearn.datasets import load_digits import matplotli ...
分类:其他好文   时间:2019-11-26 19:58:32    阅读次数:106
Java大数类 BigInteger
package bigint; /** * This class encapsulates a BigInteger, i.e. a positive or negative integer * with any number of digits, which overcomes the compu ...
分类:编程语言   时间:2019-11-17 14:43:40    阅读次数:85
[LC] 66. Plus One
Given a non-empty array of digits representing a non-negative integer, plus one to the integer. The digits are stored such that the most significant d ...
分类:其他好文   时间:2019-11-17 10:56:47    阅读次数:52
[LC] 7. Reverse Integer
Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 1 ...
分类:其他好文   时间:2019-11-17 10:33:14    阅读次数:62
LightOJ - 1282 - Leading and Trailing(数学技巧,快速幂取余)
链接: https://vjudge.net/problem/LightOJ 1282 题意: You are given two integers: n and k, your task is to find the most significant three digits, and least ...
分类:其他好文   时间:2019-11-13 09:19:03    阅读次数:95
codeforces #584 ABCD
A. Paint the Numbers Description Solution 水题 B. Koala and Lights Description Solution 模拟到1e4。 C. Paint the Digits Description 给出一个序列,将序列每个值染色为1或2。 问能否 ...
分类:其他好文   时间:2019-11-10 19:37:44    阅读次数:93
LeetCode: Add Two Numbers
You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contai ...
分类:其他好文   时间:2019-11-10 17:34:22    阅读次数:104
LeetCode 842. Split Array into Fibonacci Sequence
原题链接在这里:https://leetcode.com/problems/split-array-into-fibonacci-sequence/ 题目: Given a string S of digits, such as S = "123456579", we can split it in ...
分类:其他好文   时间:2019-11-10 13:42:47    阅读次数:78
Codeforces Round #589 (Div. 2)
__ "Codeforces Round 589 (Div. 2)" __ __ "A. Distinct Digits" __ __思路:水题__ AC代码 ...
分类:其他好文   时间:2019-11-05 21:56:30    阅读次数:115
2. Add Two Numbers
You are given two non-empty linked lists representing two non-negative integers. The digits are stored in reverse order and each of their nodes contai ...
分类:其他好文   时间:2019-11-03 12:24:14    阅读次数:83
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