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Add regression line equation and R^2 on graph

I wonder how to add regression line equation and R^2 on the ggplot . My code is: 9 Answers ...
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C: Run a System Command and Get Output? [duplicate]

I want to run a command in linux and get the text returned of what it outputs, but I do not want this text printed to screen. Is there a more elegant way than making a temporary file? ...
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C default arguments

Is there a way to specify default arguments to a function in C? 19 Answers 19 ...
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How do I get the height and width of the Android Navigation Bar programmatically?

The black navigation bar on the bottom of the screen is not easily removable in Android. It has been part of Android since 3.0 as a replacement for hardware buttons. Here is a picture: ...
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MQTT物联网协议完全实践指南 · App Inventor 2 中文网

... MQTT采用客户端-服务器架构,基于发布/订阅(Publish/Subscribe)模式实现消息传递: graph LR A[发布者A] --> C[MQTT代理服务器] B[发布者B] --> C C --> D[订阅者X] C --> E[订阅者Y] C --> F[订阅者Z] 核心组件说明: 发布者...
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What does the C++ standard state the size of int, long type to be?

I'm looking for detailed information regarding the size of basic C++ types. I know that it depends on the architecture (16 bits, 32 bits, 64 bits) and the compiler. ...
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Profiling Vim startup time

I’ve got a lot of plugins enabled when using Vim – I have collected plugins over the years. I’m a bit fed up with how long Vim takes to start now, so I’d like to profile its startup and see which of the many plugins I have are responsible. ...
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Joining three tables using MySQL

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Get name of current class?

How do I get the name of the class I am currently in? 7 Answers 7 ...
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How do I commit only some files?

I have two projects. One is the "official" project and the second is a light modification (some files added). I created new branch and I put new files to them. But in during development some files common to both branches is changed. ...