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adding noise to a signal in python
...d: {sd}")
data_df = pd.DataFrame(data, columns=['Value'])
data_df['Index'] = data_df.index.values
# Adding gaussian jitter
jitter = 0.3*rnd_state.normal(mu, sd, size=data_df.shape[0])
data_df['with_jitter'] = data_df['Value'] + jitter
index_further_away = None
if add_an...
How can I see what has changed in a file before committing to git?
...on, there are three useful ways to use git diff:
Show differences between index and working tree; that is, changes you haven't staged to commit:
git diff [filename]
Show differences between current commit and index; that is, what you're about to commit (--staged does exactly the same thing, use ...
Is there an R function for finding the index of an element in a vector?
In R, I have an element x and a vector v . I want to find the first index of an element in v that is equal to x . I know that one way to do this is: which(x == v)[[1]] , but that seems excessively inefficient. Is there a more direct way to do it?
...
Getting the last element of a list
...lement
>>> some_list
[1, 3, 5]
Note that getting a list item by index will raise an IndexError if the expected item doesn't exist. This means that some_list[-1] will raise an exception if some_list is empty, because an empty list can't have a last element.
...
std::string截取字符串，截取ip:port - C/C++ - 清泛网 - 专注C/C++及内核技术
...:string截取字符串，截取ip:portstd::string ip("127.0.0.1:8888");int index = ip.find_last_of(':'); 获取ipip.substr(0, index).c_str(); 获取portip.substr(index + 1).c_str();std::string ip("127.0.0.1:8888");
int index = ip.find_last_of(':');
// 获取ip
ip.substr(0, index).c_str();
//...
CString的截取字符串，截取ip:port - C/C++ - 清泛网 - 专注C/C++及内核技术
...如下：CString strIpPort = "127.0.0.1:8888";CString strIp, strPort;int index = strIpPort.Find('...CString截取ip:port，代码如下：
CString strIpPort = "127.0.0.1:8888";
CString strIp, strPort;
int index = strIpPort.Find(':');
if (index > 0)
{
strIp = strIpPort.Left(index);
strPort...
error C2662: “Screen::move”: 不能将“this”指针从“const Screen”转...
...换丢失限定符出错代码： 成员函数定义Screen& Screen::move(index r,index c){ index row = r * width; cursor = row + c;...出错代码：
//成员函数定义
Screen& Screen::move(index r,index c)
{
index row = r * width;
cursor = row + c;
return *this;
}
con...
TokuMX vs. MongoDB 性能对比 - 大数据 & AI - 清泛网 - 专注C/C++及内核技术
...。
Currently unsupported functionality
● dropDups option for unique indexes
● Background Indexing, the “background” option is ignored when creating indexes.
● Fulltext indexes
● Geospatial indexes
磁盘消耗对比：
选择MongoDB就必然会面对磁盘消耗的问...
JS文字卷动效果的调用函数：startmarquee - 更多技术 - 清泛网 - 专注C/C++及内核技术
...。这里介绍一下实现原理：function startmarquee(lh,speed,delay,index){ *函数startmarquee的参数： jquery.sgallery.js 里面有现成的函数 startmarquee() 实现文字向上滚动效果。
这里介绍一下实现原理：
function startmarquee(lh,speed,delay,index){
/*
函...
【解决】java.lang.ArrayIndexOutOfBoundsException: length=1; index=-1 a...
使用 CustomWebView 拓展报错：
java.lang.ArrayIndexOutOfBoundsException: length=1; index=-1 at java.util.ArrayList.get(ArrayList.java:439) at com.sunny.CustomWebView.CustomWebView.getIndex(Unknown Source:26) at com.sunny.CustomWebView.CustomWebView.access$200(Unknown Source:0) at com.sunny.C...