eu.hansolo.steelseries.tools.Histogram Maven / Gradle / Ivy

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package eu.hansolo.steelseries.tools;

/**
 * @author Gerrit Grunwald 
 */
public class Histogram
{
    private final double MIN_VALUE; // the minimum value of the gauge dial
    private final double MAX_VALUE; // the maximum value of the gauge dial
    private final double MINOR_TICKMARK_SPACING;  // the distance between two minor tickmarks
    private final double[] FREQUENCE;   // frequence[i] = # occurences of value i
    private double max;            // max frequency of any value

    // Create a new histogram. 
    public Histogram(final double MIN_VALUE, final double MAX_VALUE, final double MINOR_TICKMARK_SPACING)
    {
        this.MIN_VALUE = MIN_VALUE;
        this.MAX_VALUE = MAX_VALUE;
        this.MINOR_TICKMARK_SPACING = MINOR_TICKMARK_SPACING;        
        final int N = (int) ((MAX_VALUE - MIN_VALUE) / MINOR_TICKMARK_SPACING);
        
        FREQUENCE = new double[N];
    }

    // Add one occurrence of the value i. 
    public void addDataPoint(final int INDEX)
    {
        FREQUENCE[INDEX]++;
        max = FREQUENCE[INDEX] > max ? FREQUENCE[INDEX] : max;        
    }               
    
    public void addDataPoint(final double VALUE)
    {
        addDataPoint((int) (VALUE / MINOR_TICKMARK_SPACING) - (int) (MIN_VALUE / MINOR_TICKMARK_SPACING));
    }
}