BarPieAndParetoExample.java

package tech.tablesaw.examples;

import static tech.tablesaw.aggregate.AggregateFunctions.mean;
import static tech.tablesaw.aggregate.AggregateFunctions.sum;

import tech.tablesaw.api.IntColumn;
import tech.tablesaw.api.Table;
import tech.tablesaw.columns.numbers.IntColumnType;
import tech.tablesaw.plotly.Plot;
import tech.tablesaw.plotly.api.HorizontalBarPlot;
import tech.tablesaw.plotly.api.PiePlot;
import tech.tablesaw.plotly.components.Figure;
import tech.tablesaw.plotly.components.Layout;
import tech.tablesaw.plotly.traces.BarTrace;

public class BarPieAndParetoExample {

  public static void main(String[] args) throws Exception {

    // ***************** Setup *************************
    // load the data into a table
    Table tornadoes = Table.read().csv("../data/tornadoes_1950-2014.csv");

    // Get the scale column and replace any values of -9 with the column's missing value indicator
    IntColumn scale = tornadoes.intColumn("scale");
    scale.set(scale.isEqualTo(-9), IntColumnType.missingValueIndicator());

    // ***************** Plotting **********************

    // BAR PLOTS

    // Sum the number of fatalities from each tornado, grouping by scale
    Table fatalities1 = tornadoes.summarize("fatalities", sum).by("scale");

    // Plot
    Plot.show(
        HorizontalBarPlot.create(
            "fatalities by scale", // plot title
            fatalities1, // table
            "scale", // grouping column name
            "sum [fatalities]")); // numeric column name

    // Plot the mean injuries rather than a sum.
    Table injuries1 = tornadoes.summarize("injuries", mean).by("scale");

    Plot.show(
        HorizontalBarPlot.create(
            "Average number of tornado injuries by scale", injuries1, "scale", "mean [injuries]"));

    // PIE PLOT
    Plot.show(PiePlot.create("fatalities by scale", fatalities1, "scale", "sum [fatalities]"));

    // PARETO PLOT
    Table t2 = tornadoes.summarize("fatalities", sum).by("State");

    t2 = t2.sortDescendingOn(t2.column(1).name());
    Layout layout = Layout.builder().title("Tornado Fatalities by State").build();
    BarTrace trace = BarTrace.builder(t2.categoricalColumn(0), t2.numberColumn(1)).build();
    Plot.show(new Figure(layout, trace));
  }
}