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Renaming columns in pandas
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1974
Just assign it to the .columns attribute:
>>> df = pd.DataFrame({'$a':[1,2], '$b': [...
How to convert a Binary String to a base 10 integer in Java
...without leading zeroes) that I want to convert to their corresponding base 10 numbers. Consider:
9 Answers
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Programmatically creating Markdown tables in R with KnitR
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122
Now knitr (since version 1.3) package include the kable function for a creation tables:
> ...
What's the difference between a proc and a lambda in Ruby?
...e:
p = Proc.new {|a, b| puts a**2+b**2 } # => #<Proc:0x3c7d28@(irb):1>
p.call 1, 2 # => 5
p.call 1 # => NoMethodError: undefined method `**' for nil:NilClass
p.call 1, 2, 3 # => 5
l = lambda {|a, b| puts a**2+b**2 } # => #<Proc:0x15016c@(irb):5 (lambda)>
l.call 1, 2 # =&g...
Convert a list of data frames into one data frame
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148
Use bind_rows() from the dplyr package:
bind_rows(list_of_dataframes, .id = "column_label")
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How to delete history of last 10 commands in shell?
...
18 Answers
18
Active
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Convert floats to ints in Pandas?
...mns=['a'])
df.a = df.a.astype(float)
df
Out[33]:
a
0 0.0000000
1 1.0000000
2 2.0000000
3 3.0000000
4 4.0000000
pd.options.display.float_format = '{:,.0f}'.format
df
Out[35]:
a
0 0
1 1
2 2
3 3
4 4
shar...
Understanding “randomness”
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1481
Just a clarification
Although the previous answers are right whenever you try to spot the ra...
Numpy array dimensions
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513
It is .shape:
ndarray.shape
Tuple of array dimensions.
Thus:
>>> a.shape
(2, ...
How to print number with commas as thousands separators?
I am trying to print an integer in Python 2.6.1 with commas as thousands separators. For example, I want to show the number 1234567 as 1,234,567 . How would I go about doing this? I have seen many examples on Google, but I am looking for the simplest practical way.
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