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How to get the first column of a pandas DataFrame as a Series?
...pandas 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'>
>>>
====================================================...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...lues,index=df.Position).to_dict()
Out[9]: {1: 'a', 2: 'b', 3: 'c', 4: 'd', 5: 'e'}
Speed comparion (using Wouter's method)
In [6]: df = pd.DataFrame(randint(0,10,10000).reshape(5000,2),columns=list('AB'))
In [7]: %timeit dict(zip(df.A,df.B))
1000 loops, best of 3: 1.27 ms per loop
In [8]: %time...
How to edit one specific row in Microsoft SQL Server Management Studio 2008?
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edited Sep 25 '13 at 19:41
Aurélien Gasser
2,72211 gold badge1616 silver badges2323 bronze badges
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RegEx to parse or validate Base64 data
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edited Jan 24 '09 at 0:50
answered Jan 24 '09 at 0:40
Gu...
How to find the installed pandas version
...
375
Check pandas.__version__:
In [76]: import pandas as pd
In [77]: pd.__version__
Out[77]: '0.12....
Why main does not return 0 here?
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Keith Thompson
221k3333 gold badges353353 silver badges557557 bronze badges
answered Dec 30 '11 at 8:43
cnicutarcnicutar
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No secret option provided to Rack::Session::Cookie warning?
...be safely ignored by Rails users.
(https://github.com/rack/rack/issues/485#issuecomment-11956708, emphasis added)
Confirmation on the rails bug discussion: https://github.com/rails/rails/issues/7372#issuecomment-11981397
...
jQuery map vs. each
...ems = $.map(items, function(i) {
return i + 1;
});
// newItems is [2,3,4,5]
You can also use the map function to remove an item from an array. For example:
var items = [0,1,2,3,4,5,6,7,8,9];
var itemsLessThanEqualFive = $.map(items, function(i) {
// removes all items > 5
if (i > 5) ...
Does the ternary operator exist in R?
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answered Jan 9 '12 at 14:52
kohskekohske
59k88 gold badges156156 silver badges151151 bronze badges
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