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How to fix the aspect ratio in ggplot?
...unding box.
(I also suggest you use ggsave to save your resulting plot to pdf/png/etc, rather than the pdf(); print(p); dev.off() sequence.)
library(ggplot2)
df <- data.frame(
x = runif(100, 0, 5),
y = runif(100, 0, 5))
ggplot(df, aes(x=x, y=y)) + geom_point() + coord_fixed()
...
为AppInventor2开发拓展(Extension) · App Inventor 2 中文网
...2天都下载不完，不过没关系，我们早已提供已下载好的工程源码，关注页面底部公众号（或搜索“fun123cn”关注），回复“源码”即可免费下载。
代码编写
采用自己较为熟悉的java开发环境就行，这里推荐使用VSCode，拓展目录...
二维码的生成细节及原理 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...学的人一同学习之。
关于QR Code Specification，可参看这个PDF：http://raidenii.net/files/datasheets/misc/qr_code.pdf
基础知识
首先，我们先说一下二维码一共有40个尺寸。官方叫版本Version。Version 1是21 x 21的矩阵，Version 2是 25 x 25的矩阵，Ver...
What is an intuitive explanation of the Expectation Maximization technique? [closed]
...er guesses:
likelihood_of_red = stats.norm(red_mean_guess, red_std_guess).pdf(both_colours)
likelihood_of_blue = stats.norm(blue_mean_guess, blue_std_guess).pdf(both_colours)
Here, we have simply put each data point into the probability density function for a normal distribution using our current...
Folder structure for a Node.js project
...ets, client-side JavaScript)
/assets/images contains image files
/assets/pdf contains static pdf files
/css contains style sheets (or compiled output by a css engine)
/js contains client side JavaScript
/controllers contain all your express routes, separated by module/area of your application (no...
VS2005混合编译ARM汇编代码 - C/C++ - 清泛网 - 专注C/C++及内核技术
...MAIN.C在VS2005编译时调用的是C编译器，但是现在很多项目工程会以C++代码编写（*.cpp），在VS2005中会用C++编译器Compile。
如果不注意这点的话，就会出现下面的结果：
error LNK2001: unresolved external symbol iGlobal
error LNK2019: unresolved exter...
2016电商“死亡”名单（上半年） - 资讯 - 清泛网 - 专注IT技能提升
...
模式：品一照明是在2006年国家“十一五”将半导体照明工程大力推动的背景下成立，是国内LED照明行业的知名品牌，致力于LED家居照明、LED商业照明及LED户外景观亮化照明领域。年销售额2013年1000万、2014年6000万，2015年超过一...
What is the “assert” function?
...ndard draft
http://www.open-std.org/jtc1/sc22/wg21/docs/papers/2012/n3337.pdf
19.3 Assertions
1 The header <cassert>, described in (Table 42), provides a macro for documenting C ++ program assertions
and a mechanism for disabling the assertion checks.
2 The contents are the same a...
How do I put two increment statements in a C++ 'for' loop?
... Ok. From open-std.org/jtc1/sc22/wg21/docs/papers/2009/n2857.pdf section 6.5.3 the last part is an "expression". (Although 1.6 #2 defines an "expression-list" as a "list of expressions separated by commas", this construct does not appear in 6.5.3.). This means that when we write "++i,+...
Why are C character literals ints instead of chars?
..."high level assembler".
(See 6.3.3 on page 6-25 of http://www.dmv.net/dec/pdf/macro.pdf)
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