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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.
...
No module named setuptools
...ific system.
– rob
May 2 '16 at 19:53
25
Debian/ubuntu: apt-get install -y python-setuptools
...
What's the difference between HEAD^ and HEAD~ in Git?
...t rev-parse documentation defines ~ as
<rev>~<n>, e.g. master~3
A suffix ~<n> to a revision parameter means the commit object that is the nth generation ancestor of the named commit object, following only the first parents. For example, <rev>~3 is equivalent to <rev>^^...
Standard deviation of a list
...
153
Since Python 3.4 / PEP450 there is a statistics module in the standard library, which has a meth...
Sorting a set of values [closed]
...:
>>> s = set(['0.000000000', '0.009518000', '10.277200999', '0.030810999', '0.018384000', '4.918560000'])
>>> sorted(s)
['0.000000000', '0.009518000', '0.018384000', '0.030810999', '10.277200999', '4.918560000']
Note that sorted is giving you a list, not a set. That's because...
jQuery: How can i create a simple overlay?
...deas how to fix this?
– Vitaly
Oct 13 '10 at 9:39
9
Got it. Had to change doctype from <!DOCTY...
Append column to pandas dataframe
...
135
It seems in general you're just looking for a join:
> dat1 = pd.DataFrame({'dat1': [9,5]})
...
String concatenation in Ruby
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answered Dec 18 '08 at 13:09
KeltiaKeltia
13.8k33 gold badges2727 silver badges3030 bronze badges
...
How to convert list of tuples to multiple lists?
... function zip() will almost do what you want:
>>> zip(*[(1, 2), (3, 4), (5, 6)])
[(1, 3, 5), (2, 4, 6)]
The only difference is that you get tuples instead of lists. You can convert them to lists using
map(list, zip(*[(1, 2), (3, 4), (5, 6)]))
...