Manish Barnwal

...just another human

Yaadon ki chuskiya

Recently, my friend, Tushar had come to Bangalore to visit me and Rahul before he left for the US for his Masters. He was here for a weekend. We intended to visit places around Bangalore. And we ended up visiting Lal Bagh. I know you are judging me right now ...

Top lessons I learned from 3 years at Walmart

Having graduated from college, I joined WalmartLabs as Statistical analyst in the year 2014. We were a batch of four freshers, all from different colleges — one from IISc. Bangalore, two from ISI Kolkata, and I from IIT Kharagpur. We were the first batch of freshers to join the data science ...

The essence of music in my life

Guitar is cool. I reckon from my childhood when seeing someone play guitar in movies inspired a sense of great appreciation for the character playing it. Remember Hrithik from the movie Kaho na pyaar hai. I always wondered how does one play this instrument.

I loved listening to songs. Sonu ...

Markdown commands I use frequently

This post is aimed to capture the list of commands I use frequently while writing a post for this site in Markdown. You can write a post both in Markdown format and in HTML format. Markdown is preferred when you want to have a free-flow writing style. HTML is used ...

Tutorial on dplyr- a package for data manipulation in R

R is the most used tool in data science. It has no dearth of packages for specific use cases. There are three packages that I feel can get your most of the work done - ggplot2, dplyr, data.table.

  • ggplot2- Used for visualization. Also known as grammar of graphics. This package ...

The essence of machine learning is function estimation

Machine learning is cool. There is no denying in that. In this post we will try to make it a little uncool, well it will still be cool but you may start looking at it differently. Machine learning is not a black box. It is intuitive and this post is ...

Time series and forecasting using R

Time series forecasting is a skill that few people claim to know. Machine learning is cool. And there are a lot of people interested in becoming a machine learning expert. But forecasting is something that is a little domain specific.

Retailers like Walmart, Target use forecasting systems and tools to ...

Do you believe in yourself?

Are you a confident person? The mind asked itself. I replied with an excited Yes!. The mind asked again, are you sure?. This time I thought for a while but again after a pause, I said yes.

Why was there a pause the second time?
We humans doubt our capabilities ...

Diving into H2O with R

Do you understand the pain when you have to train advanced machine learning algorithms like Random Forest on huge datasets? When there is a factor column that has way too many number of levels? When the time taken to train the model is so huge that you went to your ...