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Repeat each row of data.frame the number of times specified in a column
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Here's one solution:
df.expanded <- df[rep(row.names(df), df$freq), 1:2]
Result:
var1 var2
1 a d
2 b e
2.1 b e
3 c f
3.1 c f
3.2 c f
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How to get the current time in Python
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42 Answers
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Python and pip, list all versions of a package that's available?
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(update: As of March 2020, many people have reported that yolk, installed via pip install yolk3k, only returns latest version. Chris's answer seems to have the most upvotes and worked for me)
The script at pastebin does work. However it's not v...
How to access the ith column of a NumPy multidimensional array?
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724
>>> test[:,0]
array([1, 3, 5])
Similarly,
>>> test[1,:]
array([3, 4])
l...
SQL RANK() versus ROW_NUMBER()
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229
ROW_NUMBER : Returns a unique number for each row starting with 1. For rows that have duplicat...
Load RSA public key from file
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320
Below is the relevant information from the link which Zaki provided.
Generate a 2048-bit RS...
How to show first commit by 'git log'?
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edited Jun 29 '17 at 8:13
Eldamir
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Convert XML String to Object
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280
You need to use the xsd.exe tool which gets installed with the Windows SDK into a directory so...
How to change the default GCC compiler in Ubuntu?
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112
As @Tommy suggested, you should use update-alternatives.
It assigns values to every software of ...