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Indian Elections and Social Media

June 16, 2019June 16, 2019 Devji Chhanga

India is a growing Internet market with only 29.5% of the population connected to the information superhighway. It is already … Continue ReadingIndian Elections and Social Media

Data Analysis

Pandas Basics : Analyzing Indian Temperatures from 1901 – 2017

January 17, 2019January 18, 2019 Devji Chhanga

The objective of this post is to present an intuitive overview of features of pandas DataFrame object. Minimum temperature data … Continue ReadingPandas Basics : Analyzing Indian Temperatures from 1901 – 2017

Configure Anaconda on Emacs

January 9, 2019January 14, 2019 Devji Chhanga

Perhaps my quest for an ultimate IDE ends with Emacs. My goal was to use Emacs as full-flagged Python IDE. … Continue ReadingConfigure Anaconda on Emacs

Blockchain

Blockchain Applications Beyond Cryptocurrencies

September 16, 2018September 17, 2018 Devji Chhanga

Cryptocurrencies are changing the way people buy or sell anonymously. But they are plagued by hype, regulatory issues and possible … Continue ReadingBlockchain Applications Beyond Cryptocurrencies

Blockchain

Creating Your First Blockchain with Python

September 7, 2018September 13, 2018 Devji Chhanga

In this tutorial we’ll learn how to create a very basic Blockchain with Python. We will create a Blockchain with … Continue ReadingCreating Your First Blockchain with Python

Blockchain

A Beginner’s Guide to Bitcoin Mining : Learn Blockchain

September 6, 2018June 16, 2019 Devji Chhanga

The temptation to earn Bitcoins is understandable as Bitcoin is valued as world’s most expensive currency at current rates. But … Continue ReadingA Beginner’s Guide to Bitcoin Mining : Learn Blockchain

Blockchain

Proof of Work Explained Simply : Learn Blockchain

September 2, 2018September 11, 2018 Devji Chhanga

Proof of Work (PoW) is a consensus algorithm used in the original Bitcoin implementation. In a Blockchain system new transactions … Continue ReadingProof of Work Explained Simply : Learn Blockchain

Blockchain

What is Blockchain Technology?

August 15, 2018August 22, 2018 Devji Chhanga

What is blockchain technology? is perhaps the most buzzing question in tech right now. A blockchain as the name suggests … Continue ReadingWhat is Blockchain Technology?

Big Data

MapReduce Real World Example in Python : Learn Data Science

August 8, 2018August 23, 2018 Devji Chhanga

MapReduce is a great approach to problem solving. It is very popular too, but MapReduce examples other than word-count are scarce on the web. This article describes MapReduce problem solving that is beyond word-count. … Continue Reading >MapReduce Real World Example in Python : Learn Data Science

Internet of Things (IoT)

Arduino Serial Communication Basics : Learn Arduino

August 4, 2018August 22, 2018 Devji Chhanga

Arduino uses asynchronous serial communication to send-receive data to and from other devices. Arduino Uno supports serial communication via on-board UART port and Tx/Rx pins. Generally this transmission happens at 9600 bits per second which is termed as baud rate. … Continue Reading >Arduino Serial Communication Basics : Learn Arduino

Internet of Things (IoT)

Arduino Pushbutton Example : Learn Arduino

August 3, 2018August 22, 2018 Devji Chhanga

Arduino pushbutton example shows how to read a pushbutton with Arduino Uno. Pushbuttons (also spelled push-buttons) are widely used in … Continue ReadingArduino Pushbutton Example : Learn Arduino

Internet of Things (IoT)

Displaying Hello World on LCD : Learn Arduino

August 2, 2018August 22, 2018 Devji Chhanga

In this article we’ll learn displaying hello world on LCD; Interfacing 16×2 LCD with Arduino Uno and display some text … Continue ReadingDisplaying Hello World on LCD : Learn Arduino

Internet of Things (IoT)

LED Blinking on Arduino : Learn Arduino

August 1, 2018August 22, 2018 Devji Chhanga

LED Blinking on Arduino Uno should be your first Arduino project. Arduino Uno has an on-board or built-in LED, in … Continue ReadingLED Blinking on Arduino : Learn Arduino

Internet of Things (IoT)

An Introduction to Arduino Platform : Learn Arduino

July 31, 2018August 22, 2018 Devji Chhanga

Arduino is an open-source hardware prototyping platform. It is widely used today in electronics projects because it is easy to … Continue ReadingAn Introduction to Arduino Platform : Learn Arduino

Other

Reclaiming Your Privacy on Android

May 24, 2018August 22, 2018 Devji Chhanga

A major threat to your privacy emanates from your smart phone. These devices have become central medium of social interaction … Continue ReadingReclaiming Your Privacy on Android

Algorithms

Merge Sort : Why Sorting Lists in Halves is Interesting?

April 5, 2018August 14, 2018 Devji Chhanga

Searching and sorting are two basic problems which occur in various more complex computing problems. Time complexity of sorting algorithms … Continue ReadingMerge Sort : Why Sorting Lists in Halves is Interesting?

Algorithms

Zeno’s Paradoxes

February 1, 2018August 14, 2018 Devji Chhanga

Zeno was a Greek philosopher who lived circa 490 to 430 BC. Zeno’s paradoxes paradoxes have puzzled us for more … Continue ReadingZeno’s Paradoxes

Algorithms

How Credit Card Numbers Work?

January 24, 2018August 22, 2018 Devji Chhanga

How credit card numbers work? It is interesting to see how quickly payment gateway web page can check whether given … Continue ReadingHow Credit Card Numbers Work?

Big Data Data Visualization

Apache Log Visualization with Matplotlib : Learn Data Science

November 30, 2017August 22, 2018 Devji Chhanga

This post discusses Apache log visualization with Matplotlib library. First, download the data file used in this example We will … Continue ReadingApache Log Visualization with Matplotlib : Learn Data Science

NLP

NLTK Example : Detecting Geographic Setting of Sherlock Holmes Stories

November 23, 2017August 22, 2018 Devji Chhanga

As a young adult nothing thrilled me more than Jeremy Brett’s performance as Sherlock Holmes. “You know my methods, apply … Continue ReadingNLTK Example : Detecting Geographic Setting of Sherlock Holmes Stories

Apache Spark Big Data Machine Learning

Building a Movie Recommendation Service with Apache Spark

November 22, 2017August 22, 2018 Devji Chhanga

In this tutorial I’ll show you building a movie recommendation service with Apache Spark. Two users are alike if they … Continue ReadingBuilding a Movie Recommendation Service with Apache Spark

Apache Spark Big Data

GraphFrames PySpark Example : Learn Data Science

November 21, 2017August 22, 2018 Devji Chhanga

In this post, GraphFrames PySpark example is discussed with shortest path problem. GraphFrames is a Spark package that allows DataFrame-based … Continue ReadingGraphFrames PySpark Example : Learn Data Science

Apache Spark Big Data Data Mining Machine Learning

Logistic Regression with Spark : Learn Data Science

November 20, 2017August 22, 2018 Devji Chhanga

Logistic regression with Spark is achieved using MLlib. Logistic regression returns binary class labels that is “0” or “1”. In … Continue ReadingLogistic Regression with Spark : Learn Data Science

Apache Spark Big Data Data Mining

k-Means Clustering Spark Tutorial : Learn Data Science

November 17, 2017August 22, 2018 Devji Chhanga

k-Means clustering with Spark is easy to understand. MLlib comes bundled with k-Means implementation (KMeans) which can be imported from … Continue Readingk-Means Clustering Spark Tutorial : Learn Data Science

Algorithms Big Data Data Mining Machine Learning

Apriori Algorithm for Generating Frequent Itemsets

November 16, 2017August 22, 2018 Devji Chhanga

Apriori Algorithm is used in finding frequent itemsets. Identifying associations between items in a dataset of transactions can be useful … Continue ReadingApriori Algorithm for Generating Frequent Itemsets

Algorithms

Functional Programming in Python with Lambda Map Reduce and Filter

November 15, 2017August 14, 2018 Devji Chhanga

Functional programming in Python is possible with the use of lambda map reduce and filter functions. This article briefly describe … Continue ReadingFunctional Programming in Python with Lambda Map Reduce and Filter

Big Data Data Mining

Data Mining : Intuitive Partitioning of Data or 3-4-5 Rule

November 14, 2017September 11, 2018 Devji Chhanga

Intuitive partitioning or natural partitioning is used in data discretization. Data discretization is the process of converting continuous values of … Continue ReadingData Mining : Intuitive Partitioning of Data or 3-4-5 Rule

Algorithms

Why Logarithms are Beautiful?

November 13, 2017September 15, 2018 Devji Chhanga

Binary logarithm or log₂ n is the power to which the number 2 must be raised to obtain value n. Binary logarithm (and others) has numerous applications in computer science. Let’s take analysis of algorithms for example. All algorithms have a running time, also called time complexity of algorithms. … Continue Reading >Why Logarithms are Beautiful?

Algorithms Big Data Data Mining Machine Learning

k-means Clustering Algorithm with Python : Learn Data Science

November 11, 2017August 22, 2018 Devji Chhanga

k-means clustering algorithm is used to group samples (items) in k clusters; k is specified by the user. The method works … Continue Readingk-means Clustering Algorithm with Python : Learn Data Science

Big Data Hadoop

Commonly Used HDFS Commands : Learn Data Science

November 10, 2017August 22, 2018 Devji Chhanga

Hadoop Distributed File System or HDFS is the underlying storage for all Hadoop applications. HDFS can be manipulated using APIs … Continue ReadingCommonly Used HDFS Commands : Learn Data Science

Big Data Hadoop

Python MapReduce with Hadoop Streaming in Hortonworks Sandbox

November 9, 2017September 13, 2018 Devji Chhanga

Hortonworks sandbox for Hadoop Data Platform (HDP) is a quick and easy personal desktop environment to get started on learning, developing, testing and trying out new features. It saves the user from installation and configuration of Hadoop and other tools. This article explains how to run Python MapReduce word count example using Hadoop Streaming. … Continue Reading >Python MapReduce with Hadoop Streaming in Hortonworks Sandbox

Big Data Hadoop

MapReduce Streaming Example : Running Your First Job on Hadoop

November 8, 2017September 28, 2018 Devji Chhanga

Step by step tutorial to run Python Map Reduce code using Hadoop Streaming … Continue Reading >MapReduce Streaming Example : Running Your First Job on Hadoop

NLP

Extracting Text from PDF Using Apache Tika – Learn NLP

November 7, 2017August 22, 2018 Devji Chhanga

Most NLP applications need to look beyond text and HTML documents as information is contained in PDF, ePub or other formats. Apache Tika is a toolkit that extracts meta data and text from documents. There is a REST based Python library for Tika. … Continue Reading >Extracting Text from PDF Using Apache Tika – Learn NLP

Algorithms

Pangat : Finding CS Parallels in Non-Computing Environments

November 6, 2017August 22, 2018 Devji Chhanga

Computer science theories, metaphors and parallels can be found in non-computing environments if observed closely. … Continue Reading >Pangat : Finding CS Parallels in Non-Computing Environments

NLP

Improving fastText Classifier

November 5, 2017September 13, 2018 Devji Chhanga

This post describes how to improve fastText classifier using various techniques. … Continue Reading >Improving fastText Classifier

NLP

Tutorial: Text Classification With Python Using fastText

November 4, 2017September 13, 2018 Devji Chhanga

We start by training the classifier with training data. It contains questions from cooking.stackexchange.com and their associated tags on the site. Let’s build a classifier that automatically recognize a topic of the question and assign a label to it. … Continue Reading >Tutorial: Text Classification With Python Using fastText

Big Data Hadoop

Map Reduce Word Count With Python : Learn Data Science

November 3, 2017August 22, 2018 Devji Chhanga

This tutorial jumps on to hands-on coding to help anyone get up and running with Map Reduce. No Hadoop installation is required. … Continue Reading >Map Reduce Word Count With Python : Learn Data Science

NLP

A Note on Vernacular Chatbots

November 2, 2017August 22, 2018 Devji Chhanga

If bots can actually speak on phone having real conversation with the user in vernacular languages, people who cannot read and write can also shop online. … Continue Reading >A Note on Vernacular Chatbots

Other

Artificial Intelligence and Human Values

November 1, 2017August 22, 2018 Devji Chhanga

We create technology. An algorithm cannot be neutral when it is designed by biased humans. Can an AI model be indiscriminating? … Continue Reading >Artificial Intelligence and Human Values

Other

Flea Markets : Anonymous and Virtual

October 31, 2017August 22, 2018 Devji Chhanga

E-commerce fails to deliver an exploratory shopping experience where a customer does not know what is she looking for. Online stores are too organized where products are arranged in categories and sub-categories. … Continue Reading >Flea Markets : Anonymous and Virtual

NLP

Getting Started with fastText : Learn NLP

October 30, 2017August 22, 2018 Devji Chhanga

fastText is a text representation and classification library from Facebook Research developed by FAIR lab. Classification of text documents is an important natural language processing (NLP) task. It is originally written in C++ but can be accessed using Python interface. It is massively fast. See references for two defining papers. … Continue Reading >Getting Started with fastText : Learn NLP

NLP

Programming Computers to Read Stories

October 29, 2017August 22, 2018 Devji Chhanga

Can a computer read the stories, the way humans do? Of course computers can read from files much faster and accurately but second part of the question is more important. When we read a story we understand it we read the feelings of the protagonist, challenge here is to make computers do the same. … Continue Reading >Programming Computers to Read Stories

Other

Most Inspiring Satya Nadella Quotes

October 28, 2017September 11, 2018 Devji Chhanga

Nadella talks about culture, empathy, philosophy and trust apart from technology in his Hit Refresh: The Quest to Rediscover Microsoft’s Soul and Imagine a Better Future for Everyone. Six most powerful thoughts from the book that inspired me and will surely help you stay grounded. … Continue Reading >Most Inspiring Satya Nadella Quotes

Internet of Things (IoT)

Your Next Insurance Claim Surveyor Can Be A Drone

October 27, 2017September 11, 2018 Devji Chhanga

There is a great potential for drones in insurance industry across the verticals. Advancements in robotics and AI can bring exciting scenarios for insurance companies and consumers. … Continue Reading >Your Next Insurance Claim Surveyor Can Be A Drone

Algorithms

Hello World in 10 Different Programming Languages

October 26, 2017August 22, 2018 Devji Chhanga

This is my first blog post here on iDevji, a customary Hello World! … Continue Reading >Hello World in 10 Different Programming Languages

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