Meet Ashish Merchant: Jigsaw Academy’s First Student

30 Jan

This month as we celebrate Jigsaw Academy’s 4th anniversary, we have been re connecting with some of our first students. It has been fun catching up and finding out what they have been up to in the last four years. It has also been quite emotional, as we realize proudly, that all of them, have used what they learnt with us, to excel at what they do and go further and realize their career dreams.

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Musings…Co-founders Gaurav Vohra and Sarita Digumarti talk about the last 4 years at Jigsaw Academy

Yes, Jigsaw Academy turned 4 this month. We asked our co- founders, Gaurav and Sarita to write down their thoughts on the journey so far and here is what they had to say…

Gaurav Vohra


Time flies when you are having fun. Our HR just informed me that this month we celebrate Jigsaw Academy’s 4th anniversary. I am surprised. 4 years!! Already??

But then I got thinking of all that has happened in these 4 years and it seems like an awful lot. Now suddenly 4 years seems like such a short time for all that to happen.

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Preparing Reproducible Reports using knitr

This post has been written by Gunnvant Singh- Jigsaw Academy Faculty

The usual data science project involves following stages:

  • Data preparation and exploration

  • Data analysis and model building

  • Report making and presentation

Usually, the report making part of the whole exercise is conducted at the end of data analysis and is always divorced from the model building and data analysis process. The reports are created painstakingly using Microsoft Power Point and Word. A lot of copy pasting of statistical results takes place from either a SAS or an R console. If God forbid, any changes are required in the report one goes back to running the R or SAS code again, copy pasting the results back into the presentation and word document!!! Can’t there be an easy way to deal with this painfully mundane exercise? Turns out there is a way, one can use ‘knitr’ package available in R.

knitr provides two broad report generation frameworks: One can either prepare reports using LaTeX or using Markdown. In this post I will illustrate how reports along with embedded R code can be generated using both Markdown and LaTeX

Generating a LaTeX report:

In order to generate dynamic reports one needs to install the package ‘knitr’ from cran and also needs to install LaTeX engine. Miktex is the most popular LaTeX distribution and can be downloaded from

Once this is done one needs to setup the RStudio to use knitr and Miktex as the default report generating tools. Go to ‘Tools’ then ‘Global Options’ and then in the pane select ‘Sweave’. In the dialogue box that appears, make sure that for the option “Weave Rnw files using” “knitr” is chosen and for the option “Typeset LaTeX into pdf using” “pdfLaTeX” is chosen


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Jobs In Demand for 2015

23 JAn

An article by Neha Singh Verma, in the Economic Times this week talks about the Six Highest Paying Jobs of 2015. Ofcourse Research and Advanced Analytics features on the list. The article goes on to say that e-commerce players are building their analytics capabilities and in a bid to get the right analytics talent, they are offering lucrative salaries to research analysts across levels. Exactly what Jigsaw Academy has predicted in their last salary report.

To read the full article please click here:

Using Google Fusion Tables Maps: Home Insurance Case Study

Thanks to the team at vHomeInsurance for sharing their data and helping us learn more about Google Fusion Tables.

vHomeInsurance ( is the leading provider of local homeowner insurance data, research & analysis. Their home insurance analytics covers detailed neighborhood level property & rates for type of house. In addition, coverage also include broader policy & big picture drivers like climate change, policy & regulatory coverage that impacts a consumer’s home insurance.


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We are 4…..

21 Jan

Yes, this week Jigsaw Academy has turned four! Time has flown and though it seems only yesterday that we set up Jigsaw Academy with just a team of two, today we can proudly say that we have a strong, talented, savvy team of 65 people and we have trained over 10,000 students (over a 1000 from outside India). We have also, over these four years, forged partnerships in the industry and tied up with some of the best universities in India and abroad to offer long term programs in analytics.

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Waterfall charts using ggplot2 in R

A Waterfall Chart is a form of data visualization which helps in determining the cumulative effect of sequentially introduced positive or negative values – Wikipedia

Waterfall charts can be used in many areas including inventory analysis, profit-loss analysis, and sales analysis. Excel is a popular tool used for creating waterfall charts. But R gives us a quick easy way to create these charts!


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Jigsaw Academy Co-founder Sarita Digumarti Quoted in The Economic Times

We are happy to share that Sarita Digumarti was recently interviewed by Evelyn Fok, of The Economic Times for her article Foreigners Drawn to e-Classes Here.  In the article Sarita says, “A lot of them come to us because some of the courses we offer are not offered anywhere else.”

Attached is the scanned clip of the coverage.

Link to the story:

The Economic Times, Jan 17, 2015 001

Related Articles:

 Jigsaw Featured in Economic Times and Times of India
Jigsaw’s Sarita Digumarti Contributes to HR Strategy and Planning
Jigsaw Featured in DNA- Sarita Digumarti, Co-Founder of Jigsaw Writes About Analytics Careers in 2014

What is Julia?

Julia, a new programming language released in early 2012 was developed by computer scientists Stefan Karpinski and Jeff Bezanson with the objective of making use of one language to deal with any computing task. Existing programming languages were each designed with different end objectives. For example, R is built specifically to provide ease of running statistical algorithms for researchers; Matlab is great for linear algebra computations and matrix calculations whereas C and Java are known for their ability to run codes faster. Sometimes to execute any particular computing task, programmers often need more than one language which makes it difficult to code, compile and execute any given task using different syntaxes and coding styles.

16 Jan


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Our New Best Friend: Data Analytics Helps Computers Know you Better Than Your Spouse or Best Friend


14 Jan


An interesting read in yesterday’s Times of India. The article Computers know you better than your spouse or siblings by Subodh Varma, talks about how a study by researchers at the University of Cambridge and Stanford University found that computers can know you much more intimately than any of your friends and relatives, perhaps even your spouse. Guess who I will be going to the next time I need some personal advice?

Read the full article here:

Image credit: Stuart Miles,

Big Data: Structuring and Elements

Last month we posted the first of a series of videos on Big Data. The first video What is Big Data? explained the concept of Big Data, it’s advantages and it’s sources. This next video will go further and talk about the structuring and elements of Big Data.

This videos are part of Jigsaw’s Big Data course, which covers the Hadoop Distributed System and popular Big Data Technologies, while at the same time gives students hands-on exposure to industry relevant tools. At the end of the course participants are able to analyze Big Data using Hive, Pig and Impala, implement MapReduce Programs using R and build Tableau Reports and Visualizations.

For a first hand feel of our other courses visit our website and click on FREE TRIAL.


Related Articles:

Hadoop And Unstructured Data

What is Big Data? What are it’s Advantages? What are it’s Sources?

What are the Essential Big Data Skills a Data Scientist Needs?


Why we need No-SQL database systems?

We are all aware of the growing size and variety of data. Can industries use their legendary traditional database systems to store and use all this data?

Cisco predicts that by 2014, the total internet traffic will be 4.8 Zeta bytes of data. Today, anything and everything is data, a like in Facebook; data from sensors; vibration data from manufacturing equipment; a comment, a share, a tweet; video feeds from CCTV; image files, audio files from phones and cameras etc. Such varied forms of data comprise about 80% of the total data available. Generating insights from this vast sources of data for Business strategies is unavoidable in the current times.

12 Jan

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Media Picks up Jigsaw Academy Predictions for 2015


9 jan

Related Articles:

Jigsaw Featured in More Than 25 News Publications
Jigsaw Academy Poll Twitter Analysis Splashed Across the Media
Jigsaw Academy Ranked No. 1 Analytics Training Institute in India in the 2014 Analytics India Magazine Ranking

SAS® in UNIX Batch Mode

It is very important to know before we begin SAS® with Unix that UNIX operating system is case sensitive. When we execute SAS command files from the UNIX prompt, it is called batch processing. The basic concept of SAS batch mode operation in this kind of circumstance is that, rather than having your local PC constantly asking for things from the server, you just run SAS on the server directly without having to send information back to your local PC. The best part is we can do scheduling the date/time for SAS programs to be executed.


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Jigsaw Academy’s Predictions for the Analytics and Big Data Industry in 2015

Government Will Adopt Big Data on a Massive Scale 

Gujarat to rise as an Analytics Centre in India; Demand for open source skills will rise in 2015

Yet again Jigsaw Academy has been at the very epicentre of the Analytics and Big Data industry in 2014. Much of what we predicted for the industry came true this past year. E commerce in India has exploded and analytics has very much been their focus, as they strived to have an edge over competition and improve customer experience. We also saw social media analytics being leveraged to a great extent. And as the demand for data analysts continued to grow, and businesses were happy to pay well to hire and retain good analytics talent, more business schools in India and across the globe began to offer specialized courses in Analytics and Big Data.

7 Jan

As we usher in another year, we are once again excited and highly optimistic about the opportunities that 2015 will bring for those in the data industry. Here are our predictions:

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ExIT… Make a New Start

January Offers Especially for all you IT People

It’s that time of the year when we all look back on the year that’s past, evaluate our lives and make new goals for ourselves. For many of us, this includes accessing our careers and personal goals. Are we where we want to be? What can we do to reach where we want to be?

In the last year we have had many of our students from IT backgrounds make a career switch into Data Analytics. Though IT is no doubt a promising field, they felt listless and perhaps a little bit bored at work. They were also aware of the huge career potential of analytics and felt that if they did not pick up these new in demand skills, they would not advance much further in their careers. Well we devote this month to all of you who feel like them. And to give you that added push to make that first step, Jigsaw Academy is offering you special discounts. Yes our theme for the month is ExIT…..Take that first step, get trained, make a career shift into analytics and Big Data…We will be with you every step of the way.

For the month of January Jigsaw Academy is offering an additional 10% on existing discounts for IT professionals wanting to move into the world of Big Data Analytics!

Here is what’s on offer:

6 Jan

For more details and to take a look at our other offers please visit

If you are ready to make a career shift, we are there to guide and prepare you to hit the ground running. Call us!


Market Basket Analysis

5th Jan

Association Rule mining is a powerful tool in Data Mining. In large databases, it is used to identifying correlation or pattern between units. Market Basket analysis is one of the ways to derive associations by examining the buying habits of the customers in their baskets. Market Basket Analysis is a mathematical modeling technique based upon the theory that if you buy a certain group of items, you are likely to buy another group of items. It is used to analyze the customer purchasing behavior and helps in increasing the sales and maintain inventory by focusing on the point of sale transaction data.

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Optimism in the Air- Digital India Could Create $511 billion in value in India in the Next Decade


Happy New Year to all of you from all of us at Team Jigsaw. The year ahead holds much promise for all of us. We wish you much success and hope your analytics dreams all come true.

Indeed there is much anticipation about the growth of the digital industry in India and the world, which will naturally impact the analytics and Big Data industry on a massive  scale. I would like to share a recent article in the Financial times that outlines this optimism and tells us just what we can look forward to in the next decade.

Related Articles:

Guess Who’s Also Started Recruiting Data Scientists?
Big Data- The Revolution Impacting us in More Ways Than we Know
Big Data, Analytics and Mobile: The Future of Digital Tech.

Stringi Package in R

While base R as well as stringr functions are good for only simple text processing,we needed better packages for dealing with more complex problems such as natural language processing.

Hence, stringi is a package which provides replacements for nearly all the character string processing functions known from base R. It also provides high performance and portability of its facilities .Some of its many features include text sorting, text comparing, extracting words, sentences and characters, text transliteration, replacing strings,etc.

Dec 29 1

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