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What are the differences between vector and list data types in R?
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This and similar introductory questions are answered in http://www.burns-stat.com/pages/Tutor/hints_R_begin.html
It is meant to be a gentle introduction that gets you up and running with R as quickly as possible. To some extent it succeeds.
--- Edit: --
An attempt to explain further...
How do you access command line arguments in Swift?
...ence. I made a Swift port of the GNU example in C one can find at:
http://www.gnu.org/software/libc/manual/html_node/Example-of-Getopt.html
with a full description. It's tested and fully functional. It doesn't require Foundation either.
var aFlag = 0
var bFlag = 0
var cValue = String()
let ...
PDB文件：每个开发人员都必须知道的 - 更多技术 - 清泛网 - 专注C/C++及内核技术
...发人员都必须知道的PDB Files: What Every Developer Must Knowhttp: www.wintellect.com CS blogs jrobbins archive 2009 05 11 pdb-files-what-every...PDB Files: What Every Developer Must Know
http://www.wintellect.com/CS/blogs/jrobbins/archive/2009/05/11/pdb-files-what-every-developer-must-know...
Is multiplication and division using shift operators in C actually faster?
...difficult to do meaningfully, but we can look at a few facts. From http://www.penguin.cz/~literakl/intel/s.html#SAL and http://www.penguin.cz/~literakl/intel/i.html#IMUL we get an idea of x86 clock cycles needed for arithmetic shift and multiplication. Say we stick to "486" (the newest one list...
How to draw polygons on an HTML5 canvas?
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from http://www.scienceprimer.com/drawing-regular-polygons-javascript-canvas:
The following code will draw a hexagon. Change the number of sides to create different regular polygons.
var ctx = document.getElementById('hexagon').get...
What's the difference between == and .equals in Scala?
...le.com/javase/7/docs/api/java/lang/Double.html#isNaN(double)
Scala: http://www.scala-lang.org/files/archive/api/2.11.8/index.html#scala.Double@isNaN():Boolean
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nginx missing sites-available directory
...tep 3). Be sure to give it the right permissions/ownership. Likely root or www-data.
Move or copy your separate config files (just like you have in /etc/nginx/sites-available) into the directory conf.d.
Reload or restart nginx.
Eat an ice cream cone.
Any .conf files that you put into the conf.d d...
将Linux代码移植到Windows的简单方法 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
...以使用最新版本Visual Studio, Microsoft Visual Studio .NET 2003。从www.gnu.org上取得Tar的最新源代码，版本是1.13。在Cygwin下面解开tar-1.13.tar.gz.源代码包。注意请不要在Windows下面使用WINRAR或者WINZIP来解压缩。 WINRAR和WINZIP在解压缩某些tar.gz包...
Asynctask vs Thread in android
... there are lot of good resources over internet which may help you:
http://www.vogella.com/articles/AndroidBackgroundProcessing/article.html
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How to enable local network users to access my WAMP sites?
...file in notepad.
Look for this section of this file
<Directory "d:/wamp/www">
#
# Possible values for the Options directive are "None", "All",
# or any combination of:
# Indexes Includes FollowSymLinks SymLinksifOwnerMatch ExecCGI MultiViews
#
# Note that "MultiViews"...