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How do I make a matrix from a list of vectors in R?
...5
[8,] 8 1 2 3 4 5
[9,] 9 1 2 3 4 5
[10,] 10 1 2 3 4 5
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How to select date from datetime column?
I have a column of type "datetime" with values like 2009-10-20 10:00:00
8 Answers
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In-place type conversion of a NumPy array
...e, and then copy in-place into the view:
import numpy as np
x = np.arange(10, dtype='int32')
y = x.view('float32')
y[:] = x
print(y)
yields
array([ 0., 1., 2., 3., 4., 5., 6., 7., 8., 9.], dtype=float32)
To show the conversion was in-place, note that copying from x to y altered x:
p...
Why not use Double or Float to represent currency?
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1028
Because floats and doubles cannot accurately represent the base 10 multiples that we use for ...
ObjectiveC Parse Integer from String
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answered Aug 25 '10 at 17:36
Christian StewartChristian Stewart
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How does a UILabel's minimumScaleFactor work?
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105
In addition to what the other answers say, if you put minSize/defaultSize (division) as the mi...
C# list.Orderby descending
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answered Oct 13 '10 at 15:22
StriplingWarriorStriplingWarrior
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Win10 升级安装全攻略 - 操作系统(内核) - 清泛网 - 专注C/C++及内核技术
Win10 升级安装全攻略Win10发布，免费升级，对于技术控的笔者当然要第一时间体验微软的巨作。笔者笔记本是正版的Win8.1，准备在线升级Win10，以下为详细安装过程...Win10发布，免费升级，对于技术控的笔者当然要第一时间体验微...
Is it a bad practice to use an if-statement without curly braces? [closed]
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answered Jan 23 '10 at 23:02
cleeclee
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Error to install Nokogiri on OSX 10.9 Maverick?
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You can also install Nokogiri on Mac OS X 10.9 Mavericks with full XCode Install using:
gem install nokogiri -- --with-xml2-include=/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.9.sdk/usr/include/libxml2
Update
For t...