大约有 46,000 项符合查询结果（耗时：0.0601秒） [XML]
Only read selected columns
... Jun
1 2009 -41 -27 -25 -31 -31 -39
2 2010 -41 -27 -25 -31 -31 -39
3 2011 -21 -27 -2 -6 -10 -32
Change "integer" to one of the accepted types as detailed in ?read.table depending on the real type of data.
data.txt looks like this:
$ cat data.txt
"Year" "Jan" "Feb" "Mar" "Apr" "May" "Jun" "Jul...
Differences between git pull origin master & git pull origin/master
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edited May 21 '10 at 16:53
answered May 21 '10 at 16:36
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How do I rename the extension for a bunch of files?
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answered Aug 3 '09 at 21:46
Mikael AunoMikael Auno
8,09022 gold badges1818 silver badges1616 bronze badges
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How to find the length of a string in R
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edited Jun 21 '12 at 9:18
answered Jun 21 '12 at 9:04
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Convert UTC datetime string to local datetime
...= tz.tzlocal()
# utc = datetime.utcnow()
utc = datetime.strptime('2011-01-21 02:37:21', '%Y-%m-%d %H:%M:%S')
# Tell the datetime object that it's in UTC time zone since
# datetime objects are 'naive' by default
utc = utc.replace(tzinfo=from_zone)
# Convert time zone
central = utc.astimezone(to_z...
Filtering a list based on a list of booleans
...ct [2, 6] ?
– Florent
May 30 '18 at 21:03
I get it, list(compress(list_a, [not i for i in fill])) should return [2, 6]...
Add a new element to an array without specifying the index in Bash
... highest index + 1.
– mklement0
Sep 21 '12 at 3:01
4
Is there something like that in bash version...
莱昂氏unix源代码分析 PDF - 文档下载 - 清泛网 - 专注C/C++及内核技术
...09
1.1 UNIX操作系统 209
1.2 公用程序 209
1.3 其他文档 210
1.4 UNIX程序员手册 210
1.5 UNIX文档 211
1.6 UNIX操作系统源代码 211
1.7 源代码中各部分 212
1.8 源代码文件 212
1.9 分析的使用 212
1.10 对程序设计水平的一条注释...
Add legend to ggplot2 line plot
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edited Jan 30 '18 at 21:06
Gregor Thomas
91.9k1515 gold badges126126 silver badges235235 bronze badges
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How to declare constant map
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answered Aug 20 '13 at 18:21
squiguysquiguy
28k66 gold badges4747 silver badges5555 bronze badges
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