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Creating a new column based on if-elif-else condition
...df['C'] = df.apply(f, axis=1)
In [2]: df
Out[2]:
A B C
a 2 2 0
b 3 1 1
c 1 3 -1
Of course, this is not vectorized so performance may not be as good when scaled to a large number of records. Still, I think it is much more readable. Especially coming from a SAS background.
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Extracting the last n characters from a ruby string
...a one liner, you can put a number greater than the size of the string:
"123".split(//).last(5).to_s
For ruby 1.9+
"123".split(//).last(5).join("").to_s
For ruby 2.0+, join returns a string
"123".split(//).last(5).join
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jQuery hide element while preserving its space in page layout
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edited Mar 2 '12 at 3:13
Wesley Murch
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Convert array of integers to comma-separated string
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edited May 31 '13 at 18:34
Gibron
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an...
How to send POST request?
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If you really want to handle with HTTP using Python, I highly recommend Requests: HTTP for Hum...
How to deserialize a JObject to .NET object
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Rotating x axis labels in R for barplot
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answered Apr 23 '12 at 19:08
Tyler RinkerTyler Rinker
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How to join NSArray elements into an NSString?
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What does “@@ -1 +1 @@” mean in Git's diff output?
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How to get a substring of text?
I have text with length ~700. How do I get only ~30 of its first characters?
5 Answers
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