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Summarizing multiple columns with dplyr? [duplicate]
...gt; <dbl> <dbl> <dbl>
#> 1 1 3.08 2.98 2.98 2.91
#> 2 2 3.03 3.04 2.97 2.87
#> 3 3 2.85 2.95 2.95 3.06
If you want to summarize only certain columns, use summarise_at or summarise_if functions.
Alternatively, the purrrlyr package provides the same ...
Turn off auto formatting in Visual Studio
...swered Mar 30 '11 at 22:03
Tango91Tango91
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从Sloodle看三维虚拟学习环境的发展趋势 - 资讯 - 清泛网 - 专注C/C++及内核技术
... ,还整合了Google的“本地搜索 ”、“地图标注 ”、“GPS导航 ”等多项服务 ,为用户提供便捷、免费的通用服务。用户在网上既能鸟瞰世界 ,又能在虚拟城市中任意游览 ,甚至可以将所经过的线路以漫游的方式进行录像和回放 ,实...
How to commit a change with both “message” and “description” from the command line? [duplicate]
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Then, your commits will appear:
pick e152ce2 Update framework
pick ffcf91e Some magic
pick fa672e1 Update comments
Select the commit you want to reword and save.
pick e152ce2 Update framework
reword ffcf91e Some magic
pick fa672e1 Update comments
Now, you have the opportunity to add header ...
Replacing instances of a character in a string
...swered Sep 2 '15 at 7:20
Dineshs91Dineshs91
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keytool error :java.io.IoException:Incorrect AVA format
... rulerule
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How do I convert a datetime to date?
... arsars
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find() with nil when there are no records
...ered Nov 12 '14 at 10:45
hattila91hattila91
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How to get year/month/day from a date object?
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Needs parens. Otherwise october will show up as month 91 (since 9 + 1 = 91 in stringland)
– rob
Oct 2 '12 at 21:00
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How to Execute SQL Server Stored Procedure in SQL Developer?
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TemaTema
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