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cartesian product in pandas
...':[1,1], 'col1':[1,2],'col2':[3,4]})
df2 = DataFrame({'key':[1,1], 'col3':[5,6]})
merge(df1, df2,on='key')[['col1', 'col2', 'col3']]
Output:
col1 col2 col3
0 1 3 5
1 1 3 6
2 2 4 5
3 2 4 6
See here for the documentation: http://pandas.pydata....
Fastest hash for non-cryptographic uses?
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58
CRC32 is pretty fast and there's a function for it: http://www.php.net/manual/en/function.crc32...
Get ffmpeg information in friendly way
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295
A bit late, but perhaps still relevant to someone..
ffprobe is indeed an excellent way to go. N...
what does -webkit-transform: translate3d(0,0,0); exactly do? Apply to body?
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5 Answers
5
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Is 0 a decimal literal or an octal literal?
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Alok SaveAlok Save
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How to put individual tags for a scatter plot
...ter(
data[:, 0], data[:, 1], marker='o', c=data[:, 2], s=data[:, 3] * 1500,
cmap=plt.get_cmap('Spectral'))
for label, x, y in zip(labels, data[:, 0], data[:, 1]):
plt.annotate(
label,
xy=(x, y), xytext=(-20, 20),
textcoords='offset points', ha='right', va='bottom...
Java recursive Fibonacci sequence
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165
In fibonacci sequence each item is the sum of the previous two. So, you wrote a recursive algori...
Which is better, number(x) or parseFloat(x)?
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5 Answers
5
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Remove duplicated rows using dplyr
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edited Jun 19 '18 at 12:57
Axeman
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answered Apr...