HeatMapDataset (JFreeChart Class Library (version 1.0.19-fx))

All Known Implementing Classes:

DefaultHeatMapDataset
```
public interface HeatMapDataset
```
A dataset that represents a rectangular grid of (x, y, z) values. The x and y values appear at regular intervals in the dataset, while the z-values can take any value (including null for unknown values).

Since:

1.0.13

Method Summary

All Methods Instance Methods Abstract Methods
Modifier and Type	Method and Description
`double`	`getMaximumXValue()` Returns the highest x-value represented in this dataset.
`double`	`getMaximumYValue()` Returns the highest y-value represented in this dataset.
`double`	`getMinimumXValue()` Returns the lowest x-value represented in this dataset.
`double`	`getMinimumYValue()` Returns the lowest y-value represented in this dataset.
`int`	`getXSampleCount()` Returns the number of x values across the width of the dataset.
`double`	`getXValue(int xIndex)` A convenience method that returns the x-value for the given index.
`int`	`getYSampleCount()` Returns the number of y values (or samples) for the dataset.
`double`	`getYValue(int yIndex)` A convenience method that returns the y-value for the given index.
`java.lang.Number`	`getZ(int xIndex, int yIndex)` Returns the z-value at the specified sample position in the dataset.
`double`	`getZValue(int xIndex, int yIndex)` Returns the z-value at the specified sample position in the dataset.

- Method Detail
  - getXSampleCount
```
int getXSampleCount()
```
    Returns the number of x values across the width of the dataset. The values are evenly spaced between getMinimumXValue() and getMaximumXValue().
    
    Returns:
    
    The number of x-values (always > 0).
  - getYSampleCount
```
int getYSampleCount()
```
    Returns the number of y values (or samples) for the dataset. The values are evenly spaced between getMinimumYValue() and getMaximumYValue().
    
    Returns:
    
    The number of y-values (always > 0).
  - getMinimumXValue
```
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.
    
    Returns:
    
    The lowest x-value represented in this dataset.
  - getMaximumXValue
```
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.
    
    Returns:
    
    The highest x-value represented in this dataset.
  - getMinimumYValue
```
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.
    
    Returns:
    
    The lowest y-value represented in this dataset.
  - getMaximumYValue
```
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.
    
    Returns:
    
    The highest y-value represented in this dataset.
  - getXValue
```
double getXValue(int xIndex)
```
    A convenience method that returns the x-value for the given index.
    
    Parameters:
    
    xIndex - the xIndex.
    
    Returns:
    
    The x-value.
  - getYValue
```
double getYValue(int yIndex)
```
    A convenience method that returns the y-value for the given index.
    
    Parameters:
    
    yIndex - the yIndex.
    
    Returns:
    
    The y-value.
  - getZValue
```
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.
    
    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
```
java.lang.Number getZ(int xIndex,
                      int yIndex)
```
    Returns the z-value at the specified sample position in the dataset. This method can return null to indicate a missing/unknown value.
    
    Bear in mind that the class implementing this interface may store its data using primitives rather than objects, so calling this method may require a new Number object to be allocated... for this reason, it is generally preferable to use the getZValue(int, int) method unless you *know* that the dataset implementation stores the z-values using objects.
    
    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 (possibly null).

Interface HeatMapDataset

Method Summary

Method Detail

getXSampleCount

getYSampleCount

getMinimumXValue

getMaximumXValue

getMinimumYValue

getMaximumYValue

getXValue

getYValue

getZValue

getZ