Monday, September 16, 2013

Shiny R with Ubuntu


The first hearing of an application is not shiny like it as a song lyric I have ever heard. Shiny introduced by a professor, he was a friend of mine who is an expert in the field of statistics in particular R.

Shiny makes it super simple for R users like you to turn analyses into interactive web applications that anyone can use. Let your users choose input parameters using friendly controls like sliders, drop-downs, and text fields.

Easily incorporate any number of outputs like plots, tables, and summaries. No HTML or JavaScript knowledge is necessary. If you have some experience with R, you’re just minutes away from combining the statistical power of R with the simplicity of a web page. Next is complete list of instructions for installing Shiny Server and its prerequisites on Ubuntu
# Install Node.js
sudo apt-get update
sudo apt-get install software-properties-common python-software-properties python g++ make
sudo add-apt-repository ppa:chris-lea/node.js
sudo apt-get update
sudo apt-get install nodejs

# Install R
sudo add-apt-repository 'deb http://cran.rstudio.com/bin/linux/ubuntu raring/'
sudo apt-key adv --keyserver keyserver.ubuntu.com --recv-keys E084DAB9
sudo apt-get update
sudo apt-get install r-base r-base-dev


The same as above, except when installing R this line:
sudo add-apt-repository 'deb http://cran.rstudio.com/bin/linux/ubuntu raring/'
must be replaced with this line for Ubuntu 12.10:
sudo add-apt-repository 'deb http://cran.rstudio.com/bin/linux/ubuntu quantal/'
or with this line for Ubuntu 12.04:
sudo add-apt-repository 'deb http://cran.rstudio.com/bin/linux/ubuntu precise/'

# Install Shiny in system-wide library
sudo su - -c "R -e \"install.packages('shiny', repos='http://cran.rstudio.com/')\""
sudo npm install -g shiny-server

# Install Upstart script
sudo wget\ https://raw.github.com/rstudio/shiny-server/master/config/upstart/shiny-server.conf\ -O /etc/init/shiny-server.conf
# Create a system account to run Shiny apps
sudo useradd -r shiny

# Create a root directory for your website
sudo mkdir -p /var/shiny-server/www

# Create a directory for application logs
sudo mkdir -p /var/shiny-server/log
# Start Shiny
sudo start shiny-server

# Optional: Install examples to test
sudo cp -R /usr/local/lib/R/site-library/shiny/examples /var/shiny-server/www/
Now open a browser to http://localhost:3838/examples/ and see if they work.
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Monday, September 2, 2013

QMMP like WinAmp for Ubuntu 12.04 / 12.10 / 13.04

We all must have been a familiar winamp-based windows, applications mp3 player, mp4 and some videos but most of us use to play mp3. how in linux especially ubuntu, after several times trying different mp3 player application choice fell on QMMP. Similar to winamp and of course we have been accustomed to using.

Display the currently playing music, equalizer and playlist songs are easy and simple are the hallmarks of QMMP.

  
Very easy way to install it: 

sudo add-apt-repository ppa:forkotov02/ppa 

sudo apt-get update sudo apt-get install qmmp 


sudo apt-get install qmmp-plugin-pack 


For skins can be downloaded at this link.
Then place it in the folder : /home/username/.qmmp/skins


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