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How to determine whether a Pandas Column contains a particular value
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199
in of a Series checks whether the value is in the index:
In [11]: s = pd.Series(list('abc'))
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Pandas conditional creation of a series/dataframe column
...', 'green', 'red')
print(df)
yields
Set Type color
0 Z A green
1 Z B green
2 X B red
3 Y C red
If you have more than two conditions then use np.select. For example, if you want color to be
yellow when (df['Set'] == 'Z') & (df['Type'] == 'A')
otherwise blu...
How to select multiple rows filled with constants?
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15 Answers
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git log of a single revision
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edited Feb 14 '19 at 11:04
Fantastic Mr Fox
25.5k2222 gold badges7878 silver badges144144 bronze badges
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Mysql order by specific ID values
...y "order by" using predefined set of column values (ID) like: order by (ID=1,5,4,3) so I would get record 1, 5, 4, 3 in that order out?
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What is the best Battleship AI?
... games per match. Doing 50 games is just flipping a coin. I needed to do 1000 games to get any reasonable distinction between test algorithms.
Download Dreadnought 1.2.
Strategies:
keep track of all possible positions for ships that have >0 hits. The list never gets bigger than ~30K so it ...
Can C++ code be valid in both C++03 and C++11 but do different things?
... possible for C++ code to conform to both the C++03 standard and the C++11 standard, but do different things depending on under which standard it is being compiled?
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Is MATLAB OOP slow or am I doing something wrong?
...t; call_nops
Computer: PCWIN Release: 2009b
Calling each function/method 100000 times
nop() function: 0.02261 sec 0.23 usec per call
nop1-5() functions: 0.02182 sec 0.22 usec per call
nop() subfunction: 0.02244 sec 0.22 usec per call
@()[] anonymous f...
Is there a way to iterate over a slice in reverse in Go?
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141
No there is no convenient operator for this to add to the range one in place. You'll have to d...
What are the differences between numpy arrays and matrices? Which one should I use?
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edited May 7 at 14:10
hashlash
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answered Apr 11 at 11:52
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