# Data science part iii eda and model selection pdf

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## Exploratory data analysis

Slideshare uses cookies to improve functionality and performance, and to provide you with relevant advertising. If you continue browsing the site, you agree to the use of cookies on this website. See our User Agreement and Privacy Policy. See our Privacy Policy and User Agreement for details. Published on Feb 23, This lecture introduces the concept of EDA, understanding, and working with data for machine learning and predictive analysis.

Sign in. Exploratory Data Analysis EDA is a process of data analysis that primarily aims to unearth the information hidden in the data set using statistical tools, plotting tools, linear algebra, and other techniques. It helps to understand the data better and highlight its main characteristics that may help to make predictions and forecasts that can have a bearing on the future. Understanding data is core to data scienc e. Hence EDA is imperative to generating accurate machine learning models. The various attributes of the data set are:.

Exploratory data analysis EDA is a bit like taking the vital signs of your data set in order to tell what you are working with. EDA can be an explicit step you take during or before your analysis, or it can be a more organic process that changes in quantity and quality with each data set. EDA can help to familiarize you with the data especially if it is not yours or help you gain a deeper understanding of possible features and relationships in the data. Data is being generated faster and in greater quantities than ever before, so we have a lot to look through. Recent growth in options for statistical models often require that we look more closely at our data rather than go directly to a conventional model. EDA is often not statistical in terms of the final analysis of your data, but EDA should be thought of as transitional.

## A Complete Machine Learning Project Walk-Through in Python: Part One

In this post, we will give a high level overview of what exploratory data analysis EDA typically entails and then describe three of the major ways EDA is critical to successfully model and interpret its results. From the outside, data science is often thought to consist wholly of advanced statistical and machine learning techniques. However, there is another key component to any data science endeavor that is often undervalued or forgotten: exploratory data analysis EDA. At a high level, EDA is the practice of using visual and quantitative methods to understand and summarize a dataset without making any assumptions about its contents. It is a crucial step to take before diving into machine learning or statistical modeling because it provides the context needed to develop an appropriate model for the problem at hand and to correctly interpret its results. With the rise of tools that enable easy implementation of powerful machine learning algorithms, it can become tempting to skip EDA.

Feature engineering, the process creating new input features for machine learning, is one of the most effective ways to improve predictive models. Coming up with features is difficult, time-consuming, requires expert knowledge. Through feature engineering, you can isolate key information, highlight patterns, and bring in domain expertise. Feature engineering is an informal topic, and there are many possible definitions. Again, this is simply our categorization. The first type of feature engineering involves using indicator variables to isolate key information. Well, not always.

## Comprehensive Guide to Exploratory Data Analysis of Haberman’s Survival Data Set

Variable selection in regression — identifying the best subset among many variables to include in a model — is arguably the hardest part of model building. Many variable selection methods exist. Many statisticians know them, but few know they produce poorly performing models.

Sign in. Taking the next step and solving a complete machine learning problem can be daunting, but preserving and completing a first project will give you the confidence to tackle any data science problem. This series of articles will walk through a complete machine learning solution with a real-world dataset to let you see how all the pieces come together. The complete project is available on GitHub, with the first notebook here. This first article will cover steps 1—3 with the rest addressed in subsequent posts.

Developing insights about your organization, business, or research project depends on effective modeling and analysis of the data you collect.

#### COMMENT 1

• Data Science - Part III - EDA & Model Selection. 1. Presented by: Derek Kane; 2. Introduction to Exploratory Data Analysis Dataset. Edwin M. - 31.05.2021 at 19:18