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rotating axis labels in R
...f axis labels. (0=parallel, 1=all horizontal, 2=all perpendicular to axis, 3=all vertical)
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switch() statement usage
...e) {
switch(type,
mean = 1,
median = 2,
trimmed = 3)
}
test2 <- function(type) {
if (type == "mean") 1
else if (type == "median") 2
else if (type == "trimmed") 3
}
system.time( for(i in 1:1e6) test1('mean') ) # 0.89 secs
system.time( for(i in 1:1e6) test2('mean') ) #...
How do I open links in Visual Studio in my web browser and not in Visual Studio?
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63
There is an extension that provides this behavior called Open in External Browser. It works in V...
How to change the CHARACTER SET (and COLLATION) throughout a database?
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371
change database collation:
ALTER DATABASE <database_name> CHARACTER SET utf8 COLLATE utf...
How to synchronize a static variable among threads running different instances of a class in Java?
...nchronized (countLock) {
count++;
}
}
}
Method 3 is the best in many cases because the lock object is not exposed outside of your class.
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Find column whose name contains a specific string
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239
Just iterate over DataFrame.columns, now this is an example in which you will end up with a lis...
What does “mro()” do?
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answered Jan 6 '10 at 3:17
Alex MartelliAlex Martelli
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Lua简明教程 - 脚本技术 - 清泛IT论坛，有思想、有深度
...。chenhao-air:lua chenhao$ lua
Lua 5.2.2 Copyright (C) 1994-2013 Lua.org, PUC-Rio
> print("Hello, World")
Hello, World
>复制代码
也可以把脚本存成一个文件，用如下命令行来运行。>lua file.lua复制代码
或是像shell一样运行：c...
ggplot2 legend to bottom and horizontal
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Shreyas KarnikShreyas Karnik
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How to compile without warnings being treated as errors?
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83
Sure, find where -Werror is set and remove that flag. Then warnings will be only warnings.
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