大约有 47,000 项符合查询结果（耗时：0.0568秒） [XML]
Sample random rows in dataframe
...3391 -0.4385071
4 -0.9040278 -0.6593677
5 0.4180331 -1.2592415
6 0.7572246 -0.5463655
7 -0.8996483 0.4231117
8 -1.0356774 -0.1640883
9 -0.3983045 0.7157506
10 -0.9060305 2.3234110
Then select some rows at random:
> df[sample(nrow(df), 3), ]
X1 X2
9 -0.3983045 0....
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edited Dec 22 '15 at 12:57
Jonik
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...think.
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Highlight a word with jQuery
...ing but W3C standart.
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21
What should you use instead of innerHTML?
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load scripts asynchronously
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answered Oct 10 '11 at 22:00
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IntelliJ shortcut to show a popup of methods in a class that can be searched
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answered Oct 21 '10 at 22:04
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How to concatenate text from multiple rows into a single text string in SQL server?
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