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String.format() to format double in java
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answered Feb 3 '11 at 11:04
David TangDavid Tang
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How to access the ith column of a NumPy multidimensional array?
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>>> test[:,0]
array([1, 3, 5])
Similarly,
>>> test[1,:]
array([3, 4])
lets you access rows. This is covered in Section 1.4 (Indexing) of the NumPy reference. This is quick, at least in my experience. It's certainly much quicker tha...
What is the most efficient way to create a dictionary of two pandas Dataframe columns?
...ies(df.Letter.values,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 loo...
What's the difference between eval, exec, and compile?
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3 Answers
3
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In c# is there a method to find the max of 3 numbers?
Like Math.Max but takes 3 or params of int?
10 Answers
10
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Is there a performance gain in using single quotes vs double quotes in ruby?
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$ ruby -v
ruby 1.9.3p0 (2011-10-30 revision 33570) [x86_64-darwin11.0.0]
$ cat benchmark_quotes.rb
# As of Ruby 1.9 Benchmark must be required
require 'benchmark'
n = 1000000
Benchmark.bm(15) do |x|
x.report("assign single") { n.times do; c...
Generate 'n' unique random numbers within a range [duplicate]
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396
If you just need sampling without replacement:
>>> import random
>>> random...
How To Get IPython Notebook To Run Python 3?
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To set IPython Notebook to run Python 3 instead of 2 on my MAC 10.9, I did the following steps
$ sudo pip3 install ipython[all]
Then
$ ipython3 notebook
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How do I parallelize a simple Python loop?
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13 Answers
13
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Open and write data to text file using Bash?
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edited Nov 13 '14 at 18:40
Martin Tournoij
22.1k1717 gold badges8585 silver badges116116 bronze badges
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