DefaultHeatMapDataset
org.jfree.data.general

Class DefaultHeatMapDataset

    • Constructor Detail

      • DefaultHeatMapDataset

        public DefaultHeatMapDataset(int xSamples,                     int ySamples,                     double minX,                     double maxX,                     double minY,                     double maxY)
        Creates a new dataset where all the z-values are initially 0. This is a fixed size array of z-values.
        Parameters:
        xSamples - the number of x-values.
        ySamples - the number of y-values
        minX - the minimum x-value in the dataset.
        maxX - the maximum x-value in the dataset.
        minY - the minimum y-value in the dataset.
        maxY - the maximum y-value in the dataset.
    • Method Detail

      • getMinimumXValue

        public double getMinimumXValue()
        Returns the lowest x-value represented in this dataset. A requirement of this interface is that this method must never return infinite or Double.NAN values.
        Specified by:
        getMinimumXValue in interface HeatMapDataset
        Returns:
        The lowest x-value represented in this dataset.
      • getMaximumXValue

        public double getMaximumXValue()
        Returns the highest x-value represented in this dataset. A requirement of this interface is that this method must never return infinite or Double.NAN values.
        Specified by:
        getMaximumXValue in interface HeatMapDataset
        Returns:
        The highest x-value represented in this dataset.
      • getMinimumYValue

        public double getMinimumYValue()
        Returns the lowest y-value represented in this dataset. A requirement of this interface is that this method must never return infinite or Double.NAN values.
        Specified by:
        getMinimumYValue in interface HeatMapDataset
        Returns:
        The lowest y-value represented in this dataset.
      • getMaximumYValue

        public double getMaximumYValue()
        Returns the highest y-value represented in this dataset. A requirement of this interface is that this method must never return infinite or Double.NAN values.
        Specified by:
        getMaximumYValue in interface HeatMapDataset
        Returns:
        The highest y-value represented in this dataset.
      • getXValue

        public double getXValue(int xIndex)
        A convenience method that returns the x-value for the given index.
        Specified by:
        getXValue in interface HeatMapDataset
        Parameters:
        xIndex - the xIndex.
        Returns:
        The x-value.
      • getYValue

        public double getYValue(int yIndex)
        A convenience method that returns the y-value for the given index.
        Specified by:
        getYValue in interface HeatMapDataset
        Parameters:
        yIndex - the yIndex.
        Returns:
        The y-value.
      • getZValue

        public double getZValue(int xIndex,               int yIndex)
        Returns the z-value at the specified sample position in the dataset. For a missing or unknown value, this method should return Double.NAN.
        Specified by:
        getZValue in interface HeatMapDataset
        Parameters:
        xIndex - the position of the x sample in the dataset.
        yIndex - the position of the y sample in the dataset.
        Returns:
        The z-value.
      • getZ

        public Number getZ(int xIndex,          int yIndex)
        Returns the z-value at the specified sample position in the dataset. In this implementation, where the underlying values are stored in an array of double primitives, you should avoid using this method and use getZValue(int, int) instead.
        Specified by:
        getZ in interface HeatMapDataset
        Parameters:
        xIndex - the position of the x sample in the dataset.
        yIndex - the position of the y sample in the dataset.
        Returns:
        The z-value.
      • setZValue

        public void setZValue(int xIndex,             int yIndex,             double z)
        Updates a z-value in the dataset and sends a DatasetChangeEvent to all registered listeners.
        Parameters:
        xIndex - the x-index.
        yIndex - the y-index.
        z - the new z-value.
      • setZValue

        public void setZValue(int xIndex,             int yIndex,             double z,             boolean notify)
        Updates a z-value in the dataset and, if requested, sends a DatasetChangeEvent to all registered listeners.
        Parameters:
        xIndex - the x-index.
        yIndex - the y-index.
        z - the new z-value.
        notify - notify listeners?
      • equals

        public boolean equals(Object obj)
        Tests this dataset for equality with an arbitrary object.
        Overrides:
        equals in class Object
        Parameters:
        obj - the object (null permitted).
        Returns:
        A boolean.

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