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Mean per group in a data.frame [duplicate]
I have a data.frame and I need to calculate the mean per group (i.e. per Month , below).
8 Answers
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Django - limiting query results
...olution in the question doesn't work with Django 1.7 anymore and raises an error:
"Cannot reorder a query once a slice has been taken"
According to the documentation https://docs.djangoproject.com/en/dev/topics/db/queries/#limiting-querysets forcing the “step” parameter of Python slice syntax e...
In Python, how to display current time in readable format
... is in the documentation.
import time
time.strftime('%X %x %Z')
'16:08:12 05/08/03 AEST'
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Changing the Git remote 'push to' default
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Just tried git branch --set-upstream-to myfork and got an error: >error: unknown option `set-upstream-to' I'm running git 1.7.9
– alonisser
Sep 15 '13 at 21:17
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How to delete multiple buffers in Vim?
Assuming I have multiple files opened as buffers in Vim. The files have *.cpp , *.h and some are *.xml . I want to close all the XML files with :bd *.xml . However, Vim does not allow this (E93: More than one match...).
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MLKitLanguageId 拓展：离线语言识别 · App Inventor 2 中文网
...、多语言混杂、或都低于阈值）。这不是错误 ——
可以提示用户多输入文字，或调低 置信度阈值。
IdentifyFailed(operation,errorMessage)
识别失败。operation 是出错的方法名。
方法
IdentifyLanguage(text)
识别文本...
Easy way to list node modules I have npm linked?
I am looking for a command that will list the names of global modules that I have npm link 'd to local copies, also listing the local path.
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Is there a concurrent List in Java's JDK?
.... :)
– Matt Passell
Sep 3 '14 at 13:05
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@AlikElzin-kilaka Nitpicking, but according to the JLS v...
Build Android Studio app via command line
...ically re-runs the task after a file is changed
--continue: Continue after errors. Prevents stopping when errors occur
Run gradle -h for more help
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What's the easiest way to install a missing Perl module?
I get this error:
24 Answers
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