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Rotating x axis labels in R for barplot
...produce a barplot with qsec colum information
mtcars = mtcars[with(mtcars, order(-qsec)), ] #order mtcars data set by column "qsec"
end_point = 0.5 + nrow(mtcars) + nrow(mtcars) - 1 #this is the line which does the trick (together with barplot "space = 1" parameter)
barplot(mtcars$qsec, col = "gre...
set up device for development (???????????? no permissions)
...b", MODE="0666"
Run the following commands:
sudo cp /tmp/android.rules /etc/udev/rules.d/51-android.rules
sudo chmod 644 /etc/udev/rules.d/51-android.rules
sudo chown root. /etc/udev/rules.d/51-android.rules
sudo service udev restart
sudo killall adb
Disconnect the USB cable between the phone...
The ALTER TABLE statement conflicted with the FOREIGN KEY constraint
...e problem was, so I'll give a layman's example. If you have a table named 'Orders' and a table named 'Customers', and you've deleted some old customers, but not their orders, you will get this error if you decide to make a foreign key from Orders.CustomerId to Customers.Id. Some orders don't have a...
Pelican 3.3 pelican-quickstart error “ValueError: unknown locale: UTF-8”
...hange to another Login user. So we need to change the file like:
sudo vi /etc/profile or sudo vi /etc/bashrc
And then add the two line in the following files
export LC_ALL="en_US.UTF-8"
export LANG="en_US.UTF-8"
Remember do not miss one of them, it doesn't work for me just $LANG or $LC_ALL. Af...
Is mathematics necessary for programming? [closed]
....
I started programming when I was about 9 years old and it would be a stretch to say I had learnt much mathematics by that stage. However, with a bit of effort I was able to understand variables, for loops, goto statements (forgive me, I was Vic 20 BASIC and I hadn't read any Dijkstra yet) and bas...
node.js, socket.io with SSL
...owing code.. var server = https.createServer({ key: fs.readFileSync('/etc/letsencrypt/live/domain.name/privkey.pem'), cert: fs.readFileSync('/etc/letsencrypt/live/domain.name/cert.pem'), ca: fs.readFileSync('/etc/letsencrypt/live/domain.name/chain.pem'), requestCert: false, reje...
Why doesn't os.path.join() work in this case?
...his is the primary purpose for folks using os.path.join. e.g. '/'.join(['/etc/', '/conf']) results in three slashes: '/etc///conf'
– Dustin Rasener
Jul 31 '12 at 14:03
18
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Deleting all pending tasks in celery / rabbitmq
...ee an option to pick a different named queue.
Here's my process:
$ sudo /etc/init.d/celeryd stop # Wait for analytics task to be last one, Ctrl-C
$ ps -ef | grep analytics # Get the PID of the worker, not the root PID reported by celery
$ sudo kill <PID>
$ sudo /etc/init.d/celeryd stop # ...
How to move columns in a MySQL table?
...
Have in mind that changed order will not be reflected in database SQL dumps.
– skalee
Jun 16 '15 at 4:07
3
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Sorting a tab delimited file
...
sort -k4nr file.txt
to sort file.txt by column 4 numerically in reverse order. (Though the data in the question has even 5 fields so the last field would be index 5.)
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