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Convert list of dictionaries to a pandas DataFrame
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Avoiding memory leaks with Scalaz 7 zipWithIndex/group enumeratees
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Aaron NovstrupAaron Novstrup
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C#: how to get first char of a string?
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answered Oct 7 '10 at 5:01
Matthew FlaschenMatthew Flaschen
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Sort a list from another list IDs
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answered Mar 7 '13 at 15:42
Denys DenysenkoDenys Denysenko
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Assign multiple columns using := in data.table, by group
...ol1 col2 mean sum
# 1: 1 1 hi hello 2.5 5
# 2: 2 2 hi hello 3.5 7
# 3: 3 3 hi hello 4.5 9
# 4: 1 4 hi hello 2.5 5
# 5: 2 5 hi hello 3.5 7
# 6: 3 6 hi hello 4.5 9
mynames = c("Name1", "Longer%")
x[ , (mynames) := list(mean(b) * 4, sum(b) * 3), by = a]
# a b col1 ...
Difference between “!==” and “==!” [closed]
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edited Sep 7 '12 at 14:28
BoltClock♦
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How do I make a matrix from a list of vectors in R?
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[5,] 5 1 2 3 4 5
[6,] 6 1 2 3 4 5
[7,] 7 1 2 3 4 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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Simulating ENTER keypress in bash script
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answered Jun 7 '11 at 11:39
Tilman VogelTilman Vogel
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What is Ruby equivalent of Python's `s= “hello, %s. Where is %s?” % (“John”,“Mary”)`
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siegy22
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answered Aug 24 '10 at 7:39
AboutRubyAboutRuby
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How to get the first column of a pandas DataFrame as a Series?
... as pd
>>> df = pd.DataFrame({'x' : [1, 2, 3, 4], 'y' : [4, 5, 6, 7]})
>>> df
x y
0 1 4
1 2 5
2 3 6
3 4 7
>>> s = df.ix[:,0]
>>> type(s)
<class 'pandas.core.series.Series'>
>>>
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