neilbingohit/dotninjas.github.io

place to store code for .ninja

Ninja tricks for Data Science

Code in any language your like. Divide your work into lots of little bits. For big bits, write seperate files. For little fiddlely bits, write some short shell scripts. And to glue it all together, write some ninja code.

The result is a live log of your actual processing, something that it is useful to you for your day to day work AND lets you package things and pass them on to someone else.

Install and Test

Note that the following instructions usually work fine from a Bash command line on a Linux or Mac box. If using Windows, two pieces of advice:

• Just don't do it. Get a c9.io account instead. Much easier.
• But if you really must, first install - GitBash https://git-for-windows.github.io/ - Chocolatey https://chocolatey.org/

Once you've decided your platform, go to a clean new directory, on a pathname with no spaces, type...

 wget https://github.com/dotninjas/dotninjas.github.io/archive/master.zip
 unzip master.zip 
 mv dotninjas.github.io-master/* .
 cd ninja/
 sh ninja
 eg0

If that works, you should see, a report looking like the following. Which is to say that decision tree was generated from some data.

   @attribute outlook {sunny, overcast, rainy}
   @attribute temperature real
   @attribute humidity real
   @attribute windy {TRUE, FALSE}
   @attribute play {yes, no}

   overcast  64  65  TRUE   yes
   overcast  72  90  TRUE   yes
   overcast  81  75  FALSE  yes
   overcast  83  86  FALSE  yes
   rainy     65  70  TRUE   no
   rainy     68  80  FALSE  yes
   rainy     70  96  FALSE  yes
   rainy     71  91  TRUE   no
   rainy     75  80  FALSE  yes
   sunny     69  70  FALSE  yes
   sunny     72  95  FALSE  no
   sunny     75  70  TRUE   yes
   sunny     80  90  TRUE   no
   sunny     85  85  FALSE  no

   outlook = sunny
   |   humidity <= 75: yes (2.0)
   |   humidity > 75: no (3.0)
   outlook = overcast: yes (4.0)
   outlook = rainy
   |   windy = TRUE: no (2.0)
   |   windy = FALSE: yes (3.0)