July 2017
Beginner to intermediate
715 pages
17h 3m
English
Content preview from Java: Data Science Made Easy
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Creating index charts
An index chart is a line chart that shows the percentage change of something over time. Frequently, such a chart is based on a single data attribute. In the following example, we will be using the Belgian population for six decades. The data is a subset of population data found at https://ourworldindata.org/grapher/population-by-country?tab=data:
| Decade | Population |
| 1950 | 8639369 |
| 1960 | 9118700 |
| 1970 | 9637800 |
| 1980 | 9846800 |
| 1990 | 9969310 |
| 2000 | 10263618 |
We start by creating the MainApp class, which extends Application. We create a series of instance variables. The XYChart.Series class represents a series of data points for some plot. In our case, this will be for the decades and population, which we will initialize ...
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