Books recommendation series: Elements of statistical learning

Since long I was thinking to write down my recommendation of the books I have read recently or in past as well. The plan is to post atleast one book recommendation weekly.

Check below my first recommendation.

Book

Elements of statistical learning
Hastie, Tibshirani, and Friedman (2009 )
https://web.stanford.edu/~hastie/ElemStatLearn/

Theme

During the past decade has been an explosion in computation and information technology. With it has come vast amounts of data in a variety of fields such as medicine, biology, finance, and marketing. The challenge of understanding these data has led to the development of new tools in the field of statistics and spawned new areas such as data mining, machine learning, and bioinformatics. Many of these tools have common underpinnings but are often expressed with different terminology. This book describes the important ideas in these areas in a common conceptual framework. While the approach is statistical, the emphasis is on concepts rather than mathematics. The book’s coverage is broad, from supervised learning (prediction) to unsupervised learning. The many topics include neural networks, support vector machines, classification trees and boosting–the first comprehensive treatment of this topic in any book. 

Takeaway

It is a rigorous and mathematically dense book on machine learning techniques. It gives a very good explanation of how the correlation between Bias, Variance and Model Complexity works. If you have the mathematical background (calculus, linear algebra etc) this is a very good introduction to Machine Learning and covers most of the MI topics. I can say that it has a nice balance between mathematical concepts and intuitive reasoning.
I highly recommend this book for anyone entering to the field of AI/ML.

Suggestions

  • What this book doesn’t provide? is a pragmatic approach or Hands-on practice.
  • Deep analysis of why a specific method works (but it gives you some intuition about what a method is trying to do)
  • If you are doing self-study and don’t have any background in machine learning or statistics advice to refine your understanding of linear algebra and calculus before reading this book.
  • Free PDF is available but suggest to buy a print book.

Download and purchase link

Buy: https://web.stanford.edu/~hastie/ElemStatLearn/
PDF: https://web.stanford.edu/~hastie/ElemStatLearn/printings/ESLII_print12.pdf



Getting and cleaning data using R programming project notes

Brief notes of my learning from course project of getting and cleaning data course from John Hopkins University.

The purpose of this project is to demonstrate the ability to collect, work with, and clean a data set. Final goal here is to prepare tidy data that can be used for later analysis.

One of the most exciting areas in all of the data science right now is wearable computing – see for example companies like Fitbit, Nike, tomtom, Garmin etc are racing to develop the most advanced algorithms to attract new users. In this case study, the data is collected from the accelerometers from the Samsung Galaxy S smartphone. A full description is available at the site where the data was obtained:

http://archive.ics.uci.edu/ml/datasets/Human+Activity+Recognition+Using+Smartphones

Here is the dataset for the project:

https://d396qusza40orc.cloudfront.net/getdata%2Fprojectfiles%2FUCI%20HAR%20Dataset.zip

I have created an R script called run_analysis.R which does the following.

  • Merges the training and the test sets to create one data set.
  • Extracts only the measurements on the mean and standard deviation for each measurement.
  • Uses descriptive activity names to name the activities in the data set.
  • Appropriately labels the data set with descriptive variable names.
  • Finally, creates a second, independent tidy data set with the average of each variable for each activity and each subject.References:

http://archive.ics.uci.edu/ml/datasets/Human+Activity+Recognition+Using+Smartphones
https://www.coursera.org/learn/data-cleaning
https://github.com/ppant/getting-and-cleaning-data-project-coursera

 

For working code and tidy dataset please check my Github repo.