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adding noise to a signal in python

...umpy as np import matplotlib.pyplot as plt t = np.linspace(1, 100, 1000) x_volts = 10*np.sin(t/(2*np.pi)) plt.subplot(3,1,1) plt.plot(t, x_volts) plt.title('Signal') plt.ylabel('Voltage (V)') plt.xlabel('Time (s)') plt.show() x_watts = x_volts ** 2 plt.subplot(3,1,2) plt.plot(t, x_watts) plt.title...
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What is memoization and how can I use it in Python?

...orials using memoization in Python would be something like this: factorial_memo = {} def factorial(k): if k < 2: return 1 if k not in factorial_memo: factorial_memo[k] = k * factorial(k-1) return factorial_memo[k] You can get more complicated and encapsulate the memoization...
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c++获取windows程序的版本号 - C/C++ - 清泛网 - 专注C/C++及内核技术

...e <windows.h> #include <atlstr.h> #pragma comment(lib, "version") int _tmain(int argc, _TCHAR* argv[]) { LPCTSTR lpszModuleName = _T("C:\\Windows\\notepad.exe"); // Get the version information size for allocate the buffer DWORD dwHandle; DWORD dwDataSize = ::GetFileVersionIn...
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一个宏命令,就可以程序崩溃时生成dump文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

...pFile { void CreateDumpFile(LPCWSTR lpstrDumpFilePathName, EXCEPTION_POINTERS *pException) { // 创建Dump文件 // HANDLE hDumpFile = CreateFile(lpstrDumpFilePathName, GENERIC_WRITE, 0, NULL, CREATE_ALWAYS, FILE_ATTRIBUTE_NORMAL, NULL); //...
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vc/mfc *通配符 批量删除文件 - C/C++ - 清泛网 - 专注C/C++及内核技术

...使用SHFileOperation函数:#include "stdafx.h"#include <windows.h>int _tmain(int argc, _TCHAR*...直接上代码,可直接运行亲测有效,使用SHFileOperation函数: #include "stdafx.h" #include <windows.h> int _tmain(int argc, _TCHAR* argv[]) { LPTSTR delFileName = L"c...
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error LNK2019: 无法解析的外部符号 _Netbios@4,该符号在函数 中被引用 - C...

error LNK2019: 无法解析的外部符号 _Netbios@4,该符号在函数 中被引用解决方法如下:Cpp文件include语句之后加上如下代码:#pragma comment(lib,"netapi32.lib")解决方法如下: Cpp文件include语句之后加上如下代码: #pragma comment(lib,"netapi32.lib") ...
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mfc 按钮变成了非xp风格、界面变成windows经典样式的原因总结 - C/C++ - 清...

...xp风格          xp风格stdafx.h中添加:#ifdef _UNICODE#if defined _M_IX86#pragma co...首先看一下xp风格与非xp风格:   非xp风格          xp风格 stdafx.h中添加: #ifdef _UNICODE #if defined _M_IX86 #pragma comment(lin...
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CListCtrl 行高设置,自定义行高 - C/C++ - 清泛网 - 专注C/C++及内核技术

...ListCtrl { public: CMyListCtrl(void); ~CMyListCtrl(void); DECLARE_MESSAGE_MAP() virtual void MeasureItem(LPMEASUREITEMSTRUCT lpMeasureItemStruct); virtual void OnMeasureItem(int nIDCtl, LPMEASUREITEMSTRUCT lpMeasureItemStruct); virtual void DrawItem(LPDRAWITEMSTRUCT lpMeasureItemS...
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C++ 通过主机名/域名获取IP - C/C++ - 清泛网 - 专注C/C++及内核技术

...2.h> 该头文件定义了Socket编程的功能 #pragma comment(lib,"ws2_32.lib") 连接ws2_32.lib库...代码如下: #include <winsock2.h> //该头文件定义了Socket编程的功能 #pragma comment(lib,"ws2_32.lib") //连接ws2_32.lib库.只要程序中用到Winsock API 函数,...
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如何把一个POINT转化为lParam参数 - C/C++ - 清泛网 - 专注C/C++及内核技术

...ARAM(pt.x, pt.y);反之:CPoint point(lParam);里面的实现是:CPoint(_In_ LPARAM dwPoint) throw();...ATLTYPES_INLINE CPoin...MAKELPARAM(pt.x, pt.y); 反之: CPoint point(lParam); 里面的实现是: CPoint(_In_ LPARAM dwPoint) throw(); ... ATLTYPES_INLINE CPoint::CPoint(_In...