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Remove rows with all or some NAs (missing values) in data.frame
... 1 2 3 2
but using complete.cases is quite a lot more clear, and faster.
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How exactly does the python any() function work?
... expressions, Python no longer has to create that internal list of True(s) and False(s), the values will be generated as the any function iterates through the values generated one at a time by the generator expression. And, since any short-circuits, it will stop iterating as soon as it sees the firs...
Converting a Uniform Distribution to a Normal Distribution
How can I convert a uniform distribution (as most random number generators produce, e.g. between 0.0 and 1.0) into a normal distribution? What if I want a mean and standard deviation of my choosing?
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Importing CSV with line breaks in Excel 2007
...king on the file in Explorer.
I have a CSV file that is in UTF-8 encoding and contains newlines in some cells. If I open this file from Excel's File->Open menu, the "import CSV" wizard pops up and the file cannot be correctly imported: the newlines start a new row even when quoted. If I open thi...
How to send commands when opening a tmux session inside another tmux session?
...
The send-prefix command can be used to send your prefix keystroke to (the process running in) the active pane. By default, the prefix is C-b and C-b is bound to send-prefix (so that hitting it twice sends a single C-b to the active pane). This i...
C++形参与实参的区别（实例解析） - C/C++ - 清泛网 - 专注C/C++及内核技术
...而实参中的值不会变化。
参考如下示例：
void Exchg1(int x, int y)
{
int tmp;
tmp=x;
x=y;
y=tmp;
printf("Exchg1:x=%d,y=%d\n",x,y);
}
void Exchg2(int &x, int &y)
{
int tmp;
tmp=x;
x=y;
y=tmp;
printf("Exchg2:x=%d,y=%d\n",x,y);
}
void Exchg3(int *x, int *y...
C++11 tuple 这一篇就够了 - C/C++ - 清泛网 - 专注C/C++及内核技术
...元素。通过下面这段程序来认识这两个函数的用法：
#include <iostream>
#include <tuple>
#include <functional>
int main()
{
auto t1 = std::make_tuple(10, "Test", 3.14);
std::cout << "The value of t1 is "
<< "(" << std::get<0>(t1) << ", " << std::ge...
libcurl网络连接使用tcp/ip - C/C++ - 清泛网 - 专注C/C++及内核技术
...l网络连接使用tcp ip，部分代码如下：CURL *curl;CURLcode res;const char *request = "GETas.xxxxE测试发送"; curl_socket_t sockfd; * socket * ...部分代码如下：
CURL *curl;
CURLcode res;
const char *request = "GETas.xxxxE测试发送";
curl_socket_t sockfd; /* socket */
...
Boost智能指针——shared_ptr - C/C++ - 清泛网 - 专注C/C++及内核技术
...指针，首先让我们通过一个例子看看它的基本用法：
#include <string>
#include <iostream>
#include <boost/shared_ptr.hpp>
class implementation
{
public:
~implementation() { std::cout <<"destroying implementation\n"; }
void do_something() { std::cout << "did some...
NSIS脚本编程(持续更新) - 更多技术 - 清泛网 - 专注C/C++及内核技术
NSIS脚本编程(持续更新)NSIS MessageBox 中无法换行？NSIS中 $ 不但是变量常量的开头，还是一个转义字符，因此换行符应该$ n。messagebox::show MB_SETFOREGR...NSIS MessageBox 中无法换行？
NSIS中 $ 不但是变量常量的开头，还是一个转义字符...