Book Image

Data Science Algorithms in a Week

By : Dávid Natingga
Book Image

Data Science Algorithms in a Week

By: Dávid Natingga

Overview of this book

<p>Machine learning applications are highly automated and self-modifying, and they continue to improve over time with minimal human intervention as they learn with more data. To address the complex nature of various real-world data problems, specialized machine learning algorithms have been developed that solve these problems perfectly. Data science helps you gain new knowledge from existing data through algorithmic and statistical analysis.</p> <p>This book will address the problems related to accurate and efficient data classification and prediction. Over the course of 7 days, you will be introduced to seven algorithms, along with exercises that will help you learn different aspects of machine learning. You will see how to pre-cluster your data to optimize and classify it for large datasets. You will then find out how to predict data based on the existing trends in your datasets.</p> <p>This book covers algorithms such as: k-Nearest Neighbors, Naive Bayes, Decision Trees, Random Forest, k-Means, Regression, and Time-series. On completion of the book, you will understand which machine learning algorithm to pick for clustering, classification, or regression and which is best suited for your problem.</p>
Table of Contents (12 chapters)
11
Glossary of Algorithms and Methods in Data Science

Linear regression

R is equipped with the command lm to fit the linear models:

Input:

source_code/appendix_b_r/example07_linear_regression.r
temperatures = data.frame(
    fahrenheit = c(5,14,23,32,41,50),
    celsius = c(-15,-10,-5,0,5,10)
)
model = lm(celsius ~ fahrenheit, data = temperatures)
print(model)

Output:

$ Rscript example07_linear_regression.r 
Call:
lm(formula = celsius ~ fahrenheit, data = temperatures)
Coefficients:
(Intercept)   fahrenheit  
   -17.7778       0.5556