package com.imsl.test.example.stat;

import com.imsl.stat.*;
import java.text.*;

/**
 * <p>
 * Performs the backshift operation on a time series.
 * </p>
 *
 * @see <a href="TimeSeriesOperationsEx3.java">Code</a>
 * @see <a href="doc-files/TimeSeriesOperationsEx3.out">Output</a>
 */

public class TimeSeriesOperationsEx3 {

    public static void main(String args[]) throws ParseException {
        SimpleDateFormat dateFormat = new SimpleDateFormat("M/d/y");
        TimeSeries ts1 = new TimeSeries();
        /* Construct the time series*/
        ts1.setStartDate(dateFormat.parse("12/12/2010"));
        ts1.setDateIncrement(3);

        int n = 10;
        double y1[] = new double[n];

        /* Create series values */
        for (int i = 0; i < n; i++) {
            y1[i] = (i + 1.0);
        }
        ts1.setSeriesValues(y1);
        TimeSeriesOperations tsOps = new TimeSeriesOperations();

        TimeSeries ts2 = tsOps.backshift(ts1, 2);
        double[][] values1 = ts1.getSeriesValues();
        double[][] values2 = ts2.getSeriesValues();

        System.out.println("Time series 1 \t \tTime series 2");
        for (int i = 0; i < n; i++) {
            System.out.println(dateFormat.format(ts1.getDates()[i]) + "\t"
                    + values1[i][0] + "\t"
                    + dateFormat.format(ts2.getDates()[i]) + "\t"
                    + values2[i][0]);
        }
    }
}