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What's the fastest way to merge/join data.frames in R?
...s for duplicate keys. (continued after code)
DF1 = data.frame(a = c(1, 1, 2, 2), b = 1:4)
DF2 = data.frame(b = c(1, 2, 3, 3, 4), c = letters[1:5])
merge(DF1, DF2)
b a c
1 1 1 a
2 2 1 b
3 3 2 c
4 3 2 d
5 4 2 e
DF1$c = DF2$c[match(DF1$b, DF2$b)]
DF1$c
[1] a b c e
Levels: a b c d e
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How to get the path of current worksheet in VBA?
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269
Use Application.ActiveWorkbook.Path for just the path itself (without the workbook name) or Ap...
Android Preferences: How to load the default values when the user hasn't used the preferences-screen
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edited Jun 20 at 10:20
Gk Mohammad Emon
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cout is not a member of std
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answered Jul 7 '12 at 14:45
unkulunkuluunkulunkulu
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linux tee is not working with python?
...p.
So what you can do is:
/usr/bin/python -u client.py >> logfile 2>&1
Or using tee:
python -u client.py | tee logfile
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Is there any difference between the `:key => “value”` and `key: “value”` hash notations?
...ese are legal:
h = { :$in => array }
h = { :'a.b' => 'c' }
h[:s] = 42
but these are not:
h = { $in: array }
h = { 'a.b': 'c' } # but this is okay in Ruby2.2+
h[s:] = 42
You can also use anything as a key with => so you can do this:
h = { C.new => 11 }
h = { 23 => 'pancakes hous...
omp parallel vs. omp parallel for
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answered Sep 30 '09 at 20:20
Ade MillerAde Miller
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LoaderManager with multiple loaders: how to get the right cursorloader
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120
The Loader class has a method called getId(). I would hope this returns the id you've associate...
Inserting a Link to a Webpage in an IPython Notebook
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172
For visual learners.
[blue_text](url_here)
Thanks dbliss.
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How to store a git config as part of the repository?
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