分面设置在ggplot2应该也是要经常用到的一项画图内容,在数据对比以及分类显示上有着极为重要的作用, 下面是两个经常要用到的分面函数. facet_wrap(facets, nrow = NULL, ncol = NULL, scales = "fixed", shrink = TRUE, as.table = TRUE, drop = TRUE) facet_grid(facets, margins = FALSE, scales = "fixed", spac

g => g.Name == genre代表一个匿名函数.即这里向Single方法传入了一个方法类型的参数. =>左边的g代表方法的参数,可以有多个,如(g,f) => ...,=>右边代表方法的返回值,写全了是这样的:g => { return g.Name }.里之所以能点出Name属性,是因为Single方法声明了这个方法类型参数的格式,比如:Func<Student, bool>这个方法类型指示输入参数是Student类型,返回值是bool类型.对应于上面

static void Main(string[] args) { int[] arr = { 1, 3, 3, 3, 3, 4, 5, 4, 5, 8, 9, 3 }; //不重复 var unique = arr.GroupBy(o => o).Where(g => g.Count() == 1) .Select(g => g.ElementAt(0)); var uniqueList = arr.Distinct<int>().ToList(); foreach(var

A clique is a subset of vertices of an undirected graph such that every two distinct vertices in the clique are adjacent. A maximal clique is a clique that cannot be extended by including one more adjacent vertex. (Quoted from https://en.wikipedia.or

One way that the police finds the head of a gang is to check people's phone calls. If there is a phone call between A and B, we say that A and B is related. The weight of a relation is defined to be the total time length of all the phone calls made b

It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any other highways to keep the rest of

原文地址 这篇文章主要是我参考命令的,直接复制粘贴,有问题请拍砖 A. sed执行模板=sed '模式{命令1;命令2}' 即逐行读入模式空间,执行命令,最后输出打印出来 B. p打印当前模式空间所有内容,追加到默认输出之后:P打印当前模式空间开端至\n的内容,并追加到默认输出之前. Sed并不对每行末尾\n进行处理,但是对N命令追加的行间\n进行处理,因为此时sed将两行看做一行. C. n命令 n命令简单来说就是提前读取下一行,覆盖模型空间前一行,然后执行后续命令.然后再读取新行,对新读取的

http://acm.zju.edu.cn/onlinejudge/showProblem.do?problemCode=3782 题意:把输入的三元运算用计算机运算出来. ;          cin>>a>>n>>b>>m>>c;                                        s1=a*b;                               s1=a/b;                       

Prime Number Definition An integer greater than one is called a prime number if its only positive divisors (factors) are one and itself. For instance, 2, 11, 67, 89 are prime numbers but 8, 20, 27 are not. Semi-Prime Number Definition An integer grea

A vertex cover of a graph is a set of vertices such that each edge of the graph is incident to at least one vertex of the set. Now given a graph with several vertex sets, you are supposed to tell if each of them is a vertex cover or not. Input Specif

The "Hamilton cycle problem" is to find a simple cycle that contains every vertex in a graph. Such a cycle is called a "Hamiltonian cycle". In this problem, you are supposed to tell if a given cycle is a Hamiltonian cycle. Input Specif

1013 Battle Over Cities (25 分)   It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, all the highways from/toward that city are closed. We must know immediately if we need to repair any o

最近要做一个项目,做界面时遇到了这个问题,找了好多资料,终于解决了,在此记录一下,希望对有需要的人有所帮助.好了,不多说了,具体的处理如下: 新建一个类CFixSplitterWnd继承CSplitterWnd,添加 ON_WM_LBUTTONDOWN() ON_WM_SETCURSOR() ON_WM_MOUSEMOVE() 三个消息的响应,主要代码如下: 头文件 protected: afx_msg void OnLButtonDown(UINT nFlags, CPoint pt); af

Weibo is known as the Chinese version of Twitter. One user on Weibo may have many followers, and may follow many other users as well. Hence a social network is formed with followers relations. When a user makes a post on Weibo, all his/her followers

The "travelling salesman problem" asks the following question: "Given a list of cities and the distances between each pair of cities, what is the shortest possible route that visits each city and returns to the origin city?" It is an N

A graph which is connected and acyclic can be considered a tree. The hight of the tree depends on the selected root. Now you are supposed to find the root that results in a highest tree. Such a root is called the deepest root. Input Specification: Ea

这题用并查集或者dfs都可以做 dfs #include<bits/stdc++.h> using namespace std; ; bool mp[N][N]; int n,m,k; bool vis[N]; void dfs(int v) { vis[v]=true; ;i<=n;i++){ if(mp[v][i]&&!vis[i]){ dfs(i); } } } int main() { fill(mp[],mp[]+N*N,false); scanf("

使用python的图形库. 环境:conda+jupyter notebook 代码如下: import numpy as np from PIL import Image from numba import jit MAXITERS = 200 RADIUS = 100 @jit def color(z, i): v = np.log2(i+1-np.log2(np.log2(abs(z))))/5 if v < 1.0: return v**4, v**2.5, v else: v = ma

0.文件夹 文件夹 前言 序列图 1 序列图演示样例 2 序列图语法 流程图 1 流程图演示样例 2 流程图语法 节点定义 节点连接 Gravizo 声明 1. 前言 Markdown是一种轻量级的标记语言.把作者从繁杂的排版工作中解放出来,实现易读易写的文章写作,已经逐渐成为其实的行业标准.CSDN博客支持Markdown能够让广大博友更加专注于博客内容,大赞. 可是.不少博友可能对Markdown比較生疏.本博接下来用一个系列文章<Markdown简明教程>扼要介绍Markdown,希望能

2933 诗人小G 2009年NOI全国竞赛  时间限制: 1 s  空间限制: 128000 KB  题目等级 : 大师 Master     题目描述 Description 小G是一个出色的诗人,经常作诗自娱自乐.但是,他一直被一件事情所困扰,那就是诗的排版问题. 一首诗包含了若干个句子,对于一些连续的短句,可以将它们用空格隔开并放在一行中,注意一行中可以放的句子数目是没有限制的.小G给每首诗定义了一个行标准长度(行的长度为一行中符号的总个数),他希望排版后每行的长度都和行标准长度相差不远

一般linux系统都自带了gcc编译器的,你可以用你的安装光盘去安装,如果你是觉得自带的gcc版本太低了,可以去gcc的官方网站可以下载到,编译需要很长的时间,如果你只编译C或者C++可以只下载gcc-g++和gcc-core,这样编译的可能要快一些,晚上睡觉前,你可以编译,早上就可以编译好了,我一般都是这么干的.不过这样安装的前提是你的Linux上已经有gcc编译器了,把gcc-g++和gcc-core同时解压了,然后执行configure要带参数的,主要是设置你的机器类型和安装路径,执行的时