Related learning recommendations:java basic tutorial
##This article is suitable for people who have just learned the basics of the Java language , follow this article to understand and use Tablesaw projects. The examples are all demonstrated under the Windows operating systemHelloGitHub launched the "Explanation of Open Source Projects" series. Today we bring you an open source project of a data visualization library based on the Java language -
Tablesaw
Tablesaw is a Java data visualization library. It mainly consists of two parts: one is the data parsing library and the other is the data visualization library. The data parsing library mainly loads data and operates on the data (conversion, filtering, summary, etc.). The data visualization library converts target data into visual charts.Project source code address: github.com/jtablesaw/t…
复制代码 tech.tablesaw tablesaw-core LATEST
@Testpublic void tableSawTest6() { String[] students = {"小明", "李雷", "小二"}; double[] scores = {90.1, 84.3, 99.7}; Table table = Table.create("学生分数统计表").addColumns( StringColumn.create("姓名", students), DoubleColumn.create("分数", scores)); System.out.println(table.print()); }复制代码
@Testpublic void tableSawTest10() throws Exception{ Table table = Table.read().csv("/data/bush.csv"); Table whoPercents = table.xTabPercents("who"); whoPercents.columnsOfType(ColumnType.DOUBLE) .forEach(x -> ((NumberColumn) x).setPrintFormatter( NumberColumnFormatter.percent(0))); System.out.println(whoPercents.toString()); }复制代码
Load data files, loading data supports csv, database result sets, files, URLs, etc.Specify the fields of the x-axis of the table, and convert the data into percentage data.
The content of the bash.csv file is as follows:
Table robberies = Table.read().csv("./data/boston-robberies.csv"); Plot.show( AreaPlot.create( "Boston Robberies by month: Jan 1966-Oct 1975", robberies, "Record", "Robberies"));复制代码
AreaPlot.create, and then
Plot. showGenerate the html page of the chart locally and automatically open the browser for display.
boston-robberies.csv file content is as follows:
This tutorial is for those who have a certain Java programming foundation. If your project happens to require a data visualization library, the Tablesaw library is a good choice!
『Explaining Open Source Project Series』——Let people who are interested in open source projects no longer be afraid, and let the initiators of open source projects no longer be alone. Follow our articles and you will discover the joy of programming, use and discover how easy it is to participate in open source projects. Welcome to leave a message to contact us and join us, so that more people can fall in love with and contribute to open source ~
If you want to know more about programming learning, please pay attention to thephp trainingcolumn!
The above is the detailed content of OMG! Tablesaw, a Java data visualization library!. For more information, please follow other related articles on the PHP Chinese website!