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Mean per group in a data.frame [duplicate]
...aggregate was designed for:
d <- read.table(text=
'Name Month Rate1 Rate2
Aira 1 12 23
Aira 2 18 73
Aira 3 19 45
Ben 1 53 19
Ben 2 22 87
Ben 3 19 45
Cat 1 22 ...
How to show all privileges from a user in oracle?
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You can try these below views.
SELECT * FROM USER_SYS_PRIVS;
SELECT * FROM USER_TAB_PRIVS;
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Create a pointer to two-dimensional array
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Scala actors: receive vs react
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edited Jun 18 '13 at 14:25
James Sheppard
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Backbone.View “el” confusion
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121
A views el is where all the event binding takes place. You don't have to use it but if you wan...
Format floats with standard json module
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fatal: 'origin' does not appear to be a git repository
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117
$HOME/.gitconfig is your global config for git.
There are three levels of config files.
cat ...
Memory management in Qt?
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If you build your own hierarchy with QObjects, that is, you initialise all newly created QObje...
How to configure Ruby on Rails with no database?
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edited Mar 7 '15 at 19:03
CharlesL
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answered May 4 '09 ...
What is data oriented design?
...che slot takes, say, 64 bytes as well. If I want to update the position of 10 balls, I have to pull in 10*64 = 640 bytes of memory into cache and get 10 cache misses. If however I can work the positions of the balls as separate units, that will only take 4*10 = 40 bytes. That fits in one cache fetch...