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Summarizing multiple columns with dplyr? [duplicate]
...x. I have a data frame with different variables and one grouping variable. Now I want to calculate the mean for each column within each group, using dplyr in R.
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How can I make XSLT work in chrome?
...r containing a web page as an attachment, which you download.
You open the now-local web page in your browser.
The local web page creates an <iframe> whose source is https://mail.google.com/mail/.
Because you are logged in to Gmail, the frame loads the messages in your inbox.
The local web pag...
How does a Breadth-First Search work when looking for Shortest Path?
... @Shashank If we are not maintaining distance then how would we know the shortest distance,please explain more.
– Gaurav Sehgal
Apr 12 '15 at 19:17
12
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How set maximum date in datepicker dialog in android?
...ate picker maximum date is as today date according to system date.i don't know how to set date picker maximum date as today date.Can any one know help me to solve this problem.
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Can Go compiler be installed on Windows?
...n't seem to find it. I can only see Linux and OS X compilers. Does anyone know if Go programming can be done on Windows, or is it something that Google hasn't implemented yet?
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Cannot import the keyfile 'blah.pfx' - error 'The keyfile may be password protected'
... key file, any other users that get latest on this checked in key file are now going to experience this bug. If any of those users check in their "fix" and I get latest, then my machine is now broken again... and so on. Microsoft have started a trouble ticket on this and assigned it to the VS2010 ...
Numpy where function multiple conditions
...ue, False, False, False, False, False,
False, False], dtype=bool)
Now you can call np.where on the combined boolean array:
In [239]: np.where((dists >= r) & (dists <= r + dr))
Out[239]: (array([10, 11, 12]),)
In [240]: dists[np.where((dists >= r) & (dists <= r + dr))]
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How can I do time/hours arithmetic in Google Spreadsheet?
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Brilliant answer. Do you know if it is possible to do Format/Number/Normal within a formula (e.g., =Format.Number.Normal(A3))? Without that, I need to create a duplicate column of the hour column with the normal formatting.
– us...
jQuery templating engines [closed]
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it was just announced that this is now official plugin
– serg
Oct 7 '10 at 21:35
20
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Why is “copy and paste” of code dangerous? [closed]
...nge you ever need to make in the code (not just bugfixes, any change) will now be twice as expensive to do because you have to update two places - and more risky because you WILL forget one of them eventually. In other words, making it work faster now will make your work even slower in the future, w...