The phrase “All models are wrong, some are useful” is quite loosely used. Some take it in a very literal sense to imply that “Modeling is a futile exercise”.
This is a terrible misunderstanding and we shall see why shortly.
“All models are wrong, some…
Added by Venkat Raman on July 22, 2021 at 2:00am —
We often come across YouTube videos, posts, blogs, and private courses wherein they say "We accept the Null Hypothesis" instead of saying “We fail to reject the Null hypothesis”.
If you correct them, they would say what s the big difference? “The opposite of ‘Rejecting the…
Added by Venkat Raman on July 15, 2021 at 6:00am —
Abstraction: some succinct definitions.
"Abstraction is the technique of hiding implementation by providing a layer over the functionality.”
“Abstraction, as a process, denotes the extracting of the essential details about an item, or a group of items, while ignoring the inessential details”… Continue
Added by Venkat Raman on July 8, 2021 at 10:00am —
Image Credits: Unsplash
I was recently invited to judge a Data Science competition. The students were given the ‘heart disease prediction’ dataset, perhaps an improvised version of the one available on Kaggle. I had seen this dataset… Continue
Added by Venkat Raman on November 14, 2020 at 7:04am —
Dear Aspiring Data Scientist,
Before you start using ‘low code’ or ‘drag & drop’ data science tools, please learn the fundamentals.
Why aspire to be ‘Citizen Data Scientist’… Continue
Added by Venkat Raman on September 24, 2020 at 12:00am —
What is a Cheat Sheet ?
Wikipedia defines cheat sheets as a concise set of notes used for quick reference. Now the word that needs to be emphasized here is ‘quick reference’.
Added by Venkat Raman on June 8, 2020 at 11:30pm —
This article is about Intuitive explanation of Degrees of Freedom and How Degrees of Freedom affects Sudoku.
A lot of aspiring Data Scientists take courses on statistics and get befuddled with the concept of Degrees of Freedom. Some memorize it by rote as ‘n-1'.
But there is a intuitive reason why it is ‘n-1’.…
Added by Venkat Raman on January 30, 2019 at 1:51am —
Resume making is very tricky. A candidate has many dilemmas,
- whether to state a project at length or just mention the bare minimum
- whether to mention many skills or just mention his/her core competency skill…
Added by Venkat Raman on January 15, 2019 at 2:30am —
What a weird question. That’s what you would have thought after reading the headline. Perhaps you thought the word “NOT” was accidental.
Hmm, for past few years many of us have come across articles like
- “Top 10 Machine Learning Algorithms every Data Scientist …
Added by Venkat Raman on February 6, 2018 at 12:30am —
“Missile approaching, Every one run for cover”. People sending final goodbye messages to their loved ones. Family members huddling and praying together. Mother clinging to children, while the father hurriedly makes for a safe getaway for the family to the basement. Imagine the state of confusion and chaos every Hawaiian would have faced on Jan 13, 2018… Continue
Added by Venkat Raman on January 26, 2018 at 11:00am —
So what were the answers popping in your head ? Random forest, SVM, K means, Knn or even Deep Learning and its variants ?
Now some of you might laugh and say how on earth can you predict so far ahead, predicting things 100 yrs into future is crazy.…
Added by Venkat Raman on January 23, 2018 at 9:00am —
Many a blogs and articles are written on how to become a Data Scientist. The list normally goes like this
- Study descriptive statistics, hypothesis testing, probability
- Learn types of Machine learning algorithms – Supervised, Unsupervised
- Learn Python, R, SAS, SQL
- Apply machine learning techniques using Python, R, SAS
- Learn Data Visualization
While there is nothing wrong in the path illustrated above, it is not the… Continue
Added by Venkat Raman on January 11, 2018 at 12:30am —
What is R Shiny App?
R shiny app is an interactive web interface. R shiny app has two components user interface object (UI.R) and server function (Server .R). The two components are passed as arguments to the shiny app function that creates a shiny app object. For more info on how to build Shiny… Continue
Added by Venkat Raman on November 29, 2017 at 7:18pm —
Many of us are bombarded with various recommendations in our day to day life, be it on e-commerce sites or social media sites. Some of the recommendations look relevant but some create range of emotions in people, varying from confusion to anger.
There are basically two types of recommender systems, Content based and Collaborative filtering. Both have their pros and cons depending upon the… Continue
Added by Venkat Raman on November 22, 2017 at 10:00pm —