Algorithms

I am taking algorithms course in coursera.

Python week 4

Week 4 of coursera.
Been busy with odd jobs just not able to finish the assignments and be done with it.
I hope to complete all video lectures and assignments today.

Julia Meetup

I had an amazing experience organizing the first Julia meetup in Inmobi with Abhijit and Kiran.
Gave my first formal open source talk and it felt great.
Link to my slides - http://www.slideshare.net/KrishnaKalyan3/julia-meetup-bangalore

Distributed Cache - Pig

I had been trying to use Distributed-Cache in Pig.
After a lot of trial and errors behold SUCCESS!
Lets get to the meat.

Lets go through the steps.
a)Create an Eval UDF
b)Initialize Distributed Cache using getCachedFiles()
c)Initialize the Data Structure using step b.
d)Finally apply your logic on the data.

Python Week 3

Week 3 was easy. I also managed to score a whooping 92% in the test.

I am enjoying the mini assignments. Hope to complete every thing.

Cheers!

Krishna

Python Week 2

I completed the mini project however i forgot to give my weekly quiz :( . I was mad at my self for doing this after long research i found that i would be loosing around ~2% from my final score.

:(

Learning Python

Just for the record i am a big fan of python. Main reason my frustration with JAVA.
I am taking the interactive python course in Coursera.
Just finished week 0.
Wish me luck. I want to complete at least 1 MOOC fully.
Will post weekly updates on how it goes.

HBase

I have always excited with the NOSQL hype. End result HBase certification.
I took up the cloudera certification.

My thoughts:
It was a good investment of time and money.
Really exposes you to BigData NoSql Space.
It improved my over understanding of the NoSQL BigData Eco-System.

Now off to prepare for the Cloudera Admin Program.

Cheers!! 

Using Sublime Text - JULIA (Ubuntu)

Installing Sublime Text 2

sudo add-apt-repository ppa:webupd8team/sublime-text-3
sudo apt-get update
sudo apt-get install sublime-text-installer


Run Julia
julia
Pkg.add("ZMQ")
Pkg.add("IJulia")


And then follow the steps in this Site:
https://github.com/karbarcca/Sublime-IJulia

HBase : Filters

All filters are implemented on the server side.
This is called predicate push down.

You can define a new instance of the filter by using
setfilter(filter)

a)Comparison Filters

Row Filter:
Gives the ability to filter data based on rowkeys.

Family Filter:
Used to filter column Families. Data is retrieved in a column family level.

Qualifier Filter:
Used to filter out specific column qualifier.

Value Filter:
Used to filter out columns with a specific value.

Dependent Column Filter:
It uses timestamp as the reference column and includes all other columns. It lets you specify a dependent column.

b)Dedicated Filters

SingleColumnValueFilter:
This filter is used when you have exactly one column that decides if an entire row should be returned or not.

SingleColumnValueExclude Filter:
This is an exclude filter. You will not get the column as a part of your result.

Prefix Filter:
All rows that match this prefix are returned the client.

Page Filter:
You specify the pagesize for your filter. This controls how many rows per page should be returned.

.....
More Later..

Putty : Network Error Permission Denied

Well after googling for more than 3 hours i figured out why i was not able to SSH to my VM.

Error: Network Error : Permission Denied.

Solution : Open Putty from any drive other than C:\ (DONT INSTALL PUTTY IN C:)

I copied Putty to my D:\\ . I was able to SSH to my VM.

(My Session on Putty)

Simple R Scatter Plo

x=c(13,16,14,11,17,9,13,17,18,12)
y=c(6.2,8.6,7.2,4.5,9.0,3.5,6.5,9.3,9.5,5.7)
length(x)
length(y)
plot(y~x,pch=19,col="blue",xlab="X axis",ylab="y axis",main="Scatter Plot Diagram")

Data Science

My technical Goals:

a) Learn Stats

b) Figure Out R

c) Learn Python

d) Figure out HBase / Hadoop

e) Learn the art of Visualization

   

I am sure with a bit of luck and effort i will get there.

Now In Focus : R Statistics

Expect more posts on Math :P

GitHub 2

I recently help some friends learn Git!!... here is the code to do stuff on GitHub...

// Installing Git on Ubuntu

sudo apt-get install git-core

//Git version

Git –version

//Add Colors to console

git config --global color.ui auto

// Status of Repo

git status

//Structure of Git

Tree .git

//See branches

Git branch -a

//See the origins

Git remote –v

//See the log

Git log

//See the recent changes

Git whatchanged

//Deleting Remote Origin

git remote rm origin

1^st Creating Identity

//Global User Name

git config --global user.name "Example Surname"

//Global Email

git config --global user.email "your.email@gmail.com"

2^nd Creating A Repo

//Initialize Git

Git init

//Make Changes to repo

//Stage your Changes

Git add README

//Commit the Staging area

Git commit –m ‘my first commit’

//Creating a URL linking to your repo

git remote add origin https://github.com/krishnakalyan3/Nousinfo

//Pushing your commit

git push origin master

//Make changes in repo

//To see the difference between the master and local

git fetch origin

git diff master origin/master

(git merge origin/master)

//Pulling from Origin

git pull origin master

3^rd Forking

//Fork 1^st + Copy the address and use the url to clone

Git clone 

//Create a branch

Git branch

//Checkout to the branch

Git checkout

//Create changes to that branch

Gedit …..

//Maybe do a status

//ADD and Commit

//Push it to the

Git push –u origin

//Check it out to update the file system

Git checkout master

GitHub

Lately i have been experimenting with Git. Its a  whole new way to code. I was really impressed with their philosophy Social Coding. That means more sharing :).
My new git hub repo.
https://gist.github.com/krishnakalyan3

If you want to learn Git follow the links below.
http://www.youtube.com/user/GitHubGuides
http://www.codeschool.com/courses/try-git