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Assigning a variable NaN in python without numpy
...t;>> import math
>>> math.isnan(nan)
True
Before Python 3.5, one could use float("nan") (case insensitive).
Note that checking to see if two things that are NaN are equal to one another will always return false. This is in part because two things that are "not a number" cannot (str...
Random row selection in Pandas dataframe
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58
Something like this?
import random
def some(x, n):
return x.ix[random.sample(x.index, n)]...
how to get first three characters of an NSString?
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edited Jan 30 '14 at 15:39
answered Mar 14 '11 at 4:10
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Available text color classes in Bootstrap
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answered Jul 22 '14 at 19:55
Ted DelezeneTed Delezene
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Insert a row to pandas dataframe
... # sorting by index
And you get, as desired:
A B C
0 2 3 4
1 5 6 7
2 7 8 9
See in Pandas documentation Indexing: Setting with enlargement.
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Convert unix time to readable date in pandas dataframe
...22]: df
Out[22]:
<class 'pandas.core.frame.DataFrame'>
Int64Index: 358 entries, 0 to 357
Data columns (total 2 columns):
date 358 non-null values
price 358 non-null values
dtypes: float64(1), int64(1)
In [23]: df.head()
Out[23]:
date price
0 1349720105 12.08
1 13498065...
C# Error: Parent does not contain a constructor that takes 0 arguments
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dlevdlev
44.8k55 gold badges111111 silver badges128128 bronze badges
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How to set response filename without forcing “save as” dialog
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edited Oct 15 '14 at 15:39
TehShrike
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“Width equals height” constraint in Interface Builder
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Update Xcode 5.1b5
Ctrl+click and drag from a view and release while the pointer is over the view. Select "Aspect Ratio". It will create a constraint where the first and second item is the view.
Before Xcode 5.1
You can't because t...