Book Image

Practical Predictive Analytics

By : Ralph Winters
Book Image

Practical Predictive Analytics

By: Ralph Winters

Overview of this book

This is the go-to book for anyone interested in the steps needed to develop predictive analytics solutions with examples from the world of marketing, healthcare, and retail. We'll get started with a brief history of predictive analytics and learn about different roles and functions people play within a predictive analytics project. Then, we will learn about various ways of installing R along with their pros and cons, combined with a step-by-step installation of RStudio, and a description of the best practices for organizing your projects. On completing the installation, we will begin to acquire the skills necessary to input, clean, and prepare your data for modeling. We will learn the six specific steps needed to implement and successfully deploy a predictive model starting from asking the right questions through model development and ending with deploying your predictive model into production. We will learn why collaboration is important and how agile iterative modeling cycles can increase your chances of developing and deploying the best successful model. We will continue your journey in the cloud by extending your skill set by learning about Databricks and SparkR, which allow you to develop predictive models on vast gigabytes of data.
Table of Contents (19 chapters)
Title Page
About the Author
About the Reviewers
Customer Feedback

Plotting all the categories on one graph

Sometimes, it's nice to plot all of the lines on one graph rather having them as separate plots. To achieve this, we will alter the syntax a bit, so that the categories show up as stacked lines. Again, we can see the percentage of uninsured aligns across ages, with the under 18 group having the lowest uninsured rate, and the 25-54 group having the highest:

### plot all on one graph

.df <- x3[order(x3$Year.1), ]
.plot <- ggplot(data = .df, aes(x = Year.1, y = Not.Covered.Pct, colour = cat,shape = cat))
+ geom_point()
+ geom_line(size = 1)
+ scale_shape_manual(values = seq(0,15)) 
+ ylab("Not.Covered.Pct") 
+ labs(colour = "cat", shape = "cat") 
+ theme_bw(base_size = 14,base_family = "serif")

Adding labels

It can sometimes be a bit difficult to discern the differences between the categories based on the legend, especially as the number of categories increases, so we can use the directlables library to mark each line...