By Abhijit Dasgupta, Tony Ojeda, Sean Patrick Murphy, Benjamin Bengfort

While you're an aspiring information scientist who desires to examine information technological know-how and numerical programming techniques via hands-on, real-world venture examples, this can be the e-book for you. no matter if you're fresh to information technological know-how otherwise you are a professional specialist, you are going to take advantage of studying in regards to the constitution of knowledge technological know-how initiatives, the stairs within the info technology pipeline, and the programming examples provided during this publication. because the booklet is formatted to stroll you thru the initiatives with examples and reasons alongside the way in which, no previous programming adventure is needed.

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Categorical variables do not have a sense of order (where one value is considered greater than another). factor(colors_factors[1], colors_factors[2]) : >not meaningful for factors 37 Driving Visual Analysis with Automobile Data (R) However, there is an ordered categorical variable, also known in the statistical world as ordinal data. Ordinal data is just like categorical data, with one exception. There is a sense of scale or value to the data. It can be said that one value is larger than another, but the magnitude of the difference cannot be measured.

What are these very efficient cars? In the next section, we look at the makes and models of the cars in the database.

Numeric(gasCars$displ) ggplot(gasCars, aes(displ, comb08)) + geom_point() + geom_smooth() ## geom_smooth: method="auto" and size of largest group is >=1000, so using ## gam with formula: y ~ s(x, bs = "cs"). Use 'method = x' to change the ## smoothing method. ## Warning: Removed 2 rows containing missing values (stat_smooth). ## Warning: Removed 2 rows containing missing values (geom_point). The preceding commands will give you the following plot: 46 Chapter 2 This scatter plot of the data offers the convincing evidence that there is a negative, or even inverse correlation, between engine displacement and fuel efficiency; thus, smaller cars tend to be more fuel-efficient.

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