Java Code Examples for org.jfree.data.xy.XYDataset#getY()
The following examples show how to use
org.jfree.data.xy.XYDataset#getY() .
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Example 1
| Source File: XYChartHyperlinkProvider.java From jasperreports with GNU Lesser General Public License v3.0 | 6 votes |
|
@Override
public JRPrintHyperlink getEntityHyperlink(ChartEntity entity)
{
JRPrintHyperlink printHyperlink = null;
if (hasHyperlinks() && entity instanceof XYItemEntity)
{
XYItemEntity itemEntity = (XYItemEntity) entity;
XYDataset dataset = itemEntity.getDataset();
Comparable<?> serie = dataset.getSeriesKey(itemEntity.getSeriesIndex());
Map<Pair, JRPrintHyperlink> serieHyperlinks = itemHyperlinks.get(serie);
if (serieHyperlinks != null)
{
Number x = dataset.getX(itemEntity.getSeriesIndex(), itemEntity.getItem());
Number y = dataset.getY(itemEntity.getSeriesIndex(), itemEntity.getItem());
Pair<Number,Number> xyKey = new Pair<Number,Number>(x, y);
printHyperlink = serieHyperlinks.get(xyKey);
}
}
return printHyperlink;
}
Example 2
| Source File: FormulaXYZURLGenerator.java From pentaho-reporting with GNU Lesser General Public License v2.1 | 6 votes |
|
/**
* Generates a URL for a particular item within a series.
*
* @param dataset the dataset.
* @param series the series number (zero-based index).
* @param item the item number (zero-based index).
* @return The generated URL.
*/
public String generateURL( final XYDataset dataset, final int series, final int item ) {
if ( dataset instanceof XYZDataset ) {
return generateURL( (XYZDataset) dataset, series, item );
}
try {
final Object[] values = new Object[] {
dataset.getX( series, item ), dataset.getY( series, item ), null,
IntegerCache.getInteger( series ), dataset.getSeriesKey( series ),
IntegerCache.getInteger( dataset.getSeriesCount() ),
IntegerCache.getInteger( item ), IntegerCache.getInteger( dataset.getItemCount( series ) )
};
formulaExpression.setRuntime( new WrapperExpressionRuntime
( new StaticDataRow( ADDITIONAL_COLUMN_KEYS, values ), runtime ) );
final Object o = formulaExpression.getValue();
if ( o == null ) {
return null;
}
return String.valueOf( o );
} finally {
formulaExpression.setRuntime( null );
}
}
Example 3
| Source File: AbstractXYItemLabelGenerator.java From openstock with GNU General Public License v3.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 4
| Source File: AbstractXYItemLabelGenerator.java From ccu-historian with GNU General Public License v3.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 5
| Source File: AbstractXYItemLabelGenerator.java From buffer_bci with GNU General Public License v3.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 6
| Source File: AbstractXYItemLabelGenerator.java From SIMVA-SoS with Apache License 2.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 7
| Source File: XYItemLabelGenerator.java From openbd-core with GNU General Public License v3.0 | 5 votes |
|
protected Object[] createItemArray(XYDataset dataset, int series, int item) {
Object[] result = new Object[5];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (Double.isNaN(x) && dataset.getX(series, item) == null) {
result[1] = "null"; //this.nullXString;
}
else {
if (this.getXDateFormat() != null) {
result[1] = this.getXDateFormat().format(new Date((long) x));
}
else {
result[1] = this.getXFormat().format(x);
}
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = "null"; //this.nullYString;
}
else {
if (this.getYDateFormat() != null) {
result[2] = this.getYDateFormat().format(new Date((long) y));
}
else {
result[2] = this.getYFormat().format(y);
}
double total = calculateYTotal(dataset, series);
double percent = y / total;
result[3] = NumberFormat.getPercentInstance().format(percent);
if (this.getYFormat() != null) {
result[4] = this.getYFormat().format(total);
}
else if (this.getYDateFormat() != null) {
//result[4] = this.getDateFormat().format(total);
}
}
return result;
}
Example 8
| Source File: XYURLGenerator.java From openbd-core with GNU General Public License v3.0 | 5 votes |
|
/**
* Generates a URL for a particular item within a series.
*
* @param dataset
* the dataset.
* @param series
* the series index (zero-based).
* @param category
* the category index (zero-based).
*
* @return The generated URL.
*/
@SuppressWarnings("deprecation")
public String generateURL(XYDataset dataset, int series, int item) {
String seriesKey = dataset.getSeriesKey(series).toString();
Number xValue = dataset.getX(series, item);
Number yValue = dataset.getY(series, item);
String value;
if (yValue == null)
value = "";
else if (dateFormat != null)
value = this.dateFormat.format(yValue);
else
value = this.numberFormat.format(yValue);
StringBuilder generatedURL = new StringBuilder(urlLower.length());
for (int i = 0; i < urlLower.length();) {
char ch = urlLower.charAt(i);
if (ch == '$') {
if (urlLower.regionMatches(i, "$serieslabel$", 0, "$serieslabel$".length())) {
generatedURL.append(URLEncoder.encode(seriesKey));
i = i + "$serieslabel$".length();
} else if (urlLower.regionMatches(i, "$itemlabel$", 0, "$itemlabel$".length())) {
generatedURL.append(xValue);
i = i + "$itemlabel$".length();
} else if (urlLower.regionMatches(i, "$value$", 0, "$value$".length())) {
generatedURL.append(value);
i = i + "$value$".length();
} else {
// Preserve case by retrieving char from original URL
generatedURL.append(url.charAt(i));
i++;
}
} else {
// Preserve case by retrieving char from original URL
generatedURL.append(url.charAt(i));
i++;
}
}
return generatedURL.toString();
}
Example 9
| Source File: AbstractXYItemLabelGenerator.java From ECG-Viewer with GNU General Public License v2.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 10
| Source File: AbstractXYItemLabelGenerator.java From astor with GNU General Public License v2.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 11
| Source File: AbstractXYItemLabelGenerator.java From astor with GNU General Public License v2.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (Double.isNaN(x) && dataset.getX(series, item) == null) {
result[1] = this.nullXString;
}
else {
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 12
| Source File: AbstractXYItemLabelGenerator.java From buffer_bci with GNU General Public License v3.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 13
| Source File: AbstractXYItemLabelGenerator.java From opensim-gui with Apache License 2.0 | 5 votes |
|
/**
* Creates the array of items that can be passed to the
* {@link MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
*
* @return An array of three items from the dataset formatted as
* <code>String</code> objects (never <code>null</code>).
*/
protected Object[] createItemArray(XYDataset dataset, int series,
int item) {
Object[] result = new Object[3];
result[0] = dataset.getSeriesKey(series).toString();
double x = dataset.getXValue(series, item);
if (Double.isNaN(x) && dataset.getX(series, item) == null) {
result[1] = this.nullXString;
}
else {
if (this.xDateFormat != null) {
result[1] = this.xDateFormat.format(new Date((long) x));
}
else {
result[1] = this.xFormat.format(x);
}
}
double y = dataset.getYValue(series, item);
if (Double.isNaN(y) && dataset.getY(series, item) == null) {
result[2] = this.nullYString;
}
else {
if (this.yDateFormat != null) {
result[2] = this.yDateFormat.format(new Date((long) y));
}
else {
result[2] = this.yFormat.format(y);
}
}
return result;
}
Example 14
| Source File: MovingAverage.java From openstock with GNU General Public License v3.0 | 4 votes |
|
/**
* Creates a new {@link XYSeries} containing the moving averages of one
* series in the <code>source</code> dataset.
*
* @param source the source dataset.
* @param series the series index (zero based).
* @param name the name for the new series.
* @param period the averaging period.
* @param skip the length of the initial skip period.
*
* @return The dataset.
*/
public static XYSeries createMovingAverage(XYDataset source,
int series, String name, double period, double skip) {
ParamChecks.nullNotPermitted(source, "source");
if (period < Double.MIN_VALUE) {
throw new IllegalArgumentException("period must be positive.");
}
if (skip < 0.0) {
throw new IllegalArgumentException("skip must be >= 0.0.");
}
XYSeries result = new XYSeries(name);
if (source.getItemCount(series) > 0) {
// if the initial averaging period is to be excluded, then
// calculate the lowest x-value to have an average calculated...
double first = source.getXValue(series, 0) + skip;
for (int i = source.getItemCount(series) - 1; i >= 0; i--) {
// get the current data item...
double x = source.getXValue(series, i);
if (x >= first) {
// work out the average for the earlier values...
int n = 0;
double sum = 0.0;
double limit = x - period;
int offset = 0;
boolean finished = false;
while (!finished) {
if ((i - offset) >= 0) {
double xx = source.getXValue(series, i - offset);
Number yy = source.getY(series, i - offset);
if (xx > limit) {
if (yy != null) {
sum = sum + yy.doubleValue();
n = n + 1;
}
}
else {
finished = true;
}
}
else {
finished = true;
}
offset = offset + 1;
}
if (n > 0) {
result.add(x, sum / n);
}
else {
result.add(x, null);
}
}
}
}
return result;
}
Example 15
| Source File: MovingAverage.java From buffer_bci with GNU General Public License v3.0 | 4 votes |
|
/**
* Creates a new {@link XYSeries} containing the moving averages of one
* series in the <code>source</code> dataset.
*
* @param source the source dataset.
* @param series the series index (zero based).
* @param name the name for the new series.
* @param period the averaging period.
* @param skip the length of the initial skip period.
*
* @return The dataset.
*/
public static XYSeries createMovingAverage(XYDataset source,
int series, String name, double period, double skip) {
ParamChecks.nullNotPermitted(source, "source");
if (period < Double.MIN_VALUE) {
throw new IllegalArgumentException("period must be positive.");
}
if (skip < 0.0) {
throw new IllegalArgumentException("skip must be >= 0.0.");
}
XYSeries result = new XYSeries(name);
if (source.getItemCount(series) > 0) {
// if the initial averaging period is to be excluded, then
// calculate the lowest x-value to have an average calculated...
double first = source.getXValue(series, 0) + skip;
for (int i = source.getItemCount(series) - 1; i >= 0; i--) {
// get the current data item...
double x = source.getXValue(series, i);
if (x >= first) {
// work out the average for the earlier values...
int n = 0;
double sum = 0.0;
double limit = x - period;
int offset = 0;
boolean finished = false;
while (!finished) {
if ((i - offset) >= 0) {
double xx = source.getXValue(series, i - offset);
Number yy = source.getY(series, i - offset);
if (xx > limit) {
if (yy != null) {
sum = sum + yy.doubleValue();
n = n + 1;
}
}
else {
finished = true;
}
}
else {
finished = true;
}
offset = offset + 1;
}
if (n > 0) {
result.add(x, sum / n);
}
else {
result.add(x, null);
}
}
}
}
return result;
}
Example 16
| Source File: MovingAverage.java From opensim-gui with Apache License 2.0 | 4 votes |
|
/**
* Creates a new {@link XYSeries} containing the moving averages of one
* series in the <code>source</code> dataset.
*
* @param source the source dataset.
* @param series the series index (zero based).
* @param name the name for the new series.
* @param period the averaging period.
* @param skip the length of the initial skip period.
*
* @return The dataset.
*/
public static XYSeries createMovingAverage(XYDataset source,
int series, String name,
double period, double skip) {
// check arguments
if (source == null) {
throw new IllegalArgumentException("Null source (XYDataset).");
}
if (period < Double.MIN_VALUE) {
throw new IllegalArgumentException("period must be positive.");
}
if (skip < 0.0) {
throw new IllegalArgumentException("skip must be >= 0.0.");
}
XYSeries result = new XYSeries(name);
if (source.getItemCount(series) > 0) {
// if the initial averaging period is to be excluded, then
// calculate the lowest x-value to have an average calculated...
double first = source.getXValue(series, 0) + skip;
for (int i = source.getItemCount(series) - 1; i >= 0; i--) {
// get the current data item...
double x = source.getXValue(series, i);
if (x >= first) {
// work out the average for the earlier values...
int n = 0;
double sum = 0.0;
double limit = x - period;
int offset = 0;
boolean finished = false;
while (!finished) {
if ((i - offset) >= 0) {
double xx = source.getXValue(series, i - offset);
Number yy = source.getY(series, i - offset);
if (xx > limit) {
if (yy != null) {
sum = sum + yy.doubleValue();
n = n + 1;
}
}
else {
finished = true;
}
}
else {
finished = true;
}
offset = offset + 1;
}
if (n > 0) {
result.add(x, sum / n);
}
else {
result.add(x, null);
}
}
}
}
return result;
}
Example 17
| Source File: MovingAverage.java From astor with GNU General Public License v2.0 | 4 votes |
|
/**
* Creates a new {@link XYSeries} containing the moving averages of one
* series in the <code>source</code> dataset.
*
* @param source the source dataset.
* @param series the series index (zero based).
* @param name the name for the new series.
* @param period the averaging period.
* @param skip the length of the initial skip period.
*
* @return The dataset.
*/
public static XYSeries createMovingAverage(XYDataset source,
int series, String name, double period, double skip) {
if (source == null) {
throw new IllegalArgumentException("Null source (XYDataset).");
}
if (period < Double.MIN_VALUE) {
throw new IllegalArgumentException("period must be positive.");
}
if (skip < 0.0) {
throw new IllegalArgumentException("skip must be >= 0.0.");
}
XYSeries result = new XYSeries(name);
if (source.getItemCount(series) > 0) {
// if the initial averaging period is to be excluded, then
// calculate the lowest x-value to have an average calculated...
double first = source.getXValue(series, 0) + skip;
for (int i = source.getItemCount(series) - 1; i >= 0; i--) {
// get the current data item...
double x = source.getXValue(series, i);
if (x >= first) {
// work out the average for the earlier values...
int n = 0;
double sum = 0.0;
double limit = x - period;
int offset = 0;
boolean finished = false;
while (!finished) {
if ((i - offset) >= 0) {
double xx = source.getXValue(series, i - offset);
Number yy = source.getY(series, i - offset);
if (xx > limit) {
if (yy != null) {
sum = sum + yy.doubleValue();
n = n + 1;
}
}
else {
finished = true;
}
}
else {
finished = true;
}
offset = offset + 1;
}
if (n > 0) {
result.add(x, sum / n);
}
else {
result.add(x, null);
}
}
}
}
return result;
}
Example 18
| Source File: MovingAverage.java From ECG-Viewer with GNU General Public License v2.0 | 4 votes |
|
/**
* Creates a new {@link XYSeries} containing the moving averages of one
* series in the <code>source</code> dataset.
*
* @param source the source dataset.
* @param series the series index (zero based).
* @param name the name for the new series.
* @param period the averaging period.
* @param skip the length of the initial skip period.
*
* @return The dataset.
*/
public static XYSeries createMovingAverage(XYDataset source,
int series, String name, double period, double skip) {
ParamChecks.nullNotPermitted(source, "source");
if (period < Double.MIN_VALUE) {
throw new IllegalArgumentException("period must be positive.");
}
if (skip < 0.0) {
throw new IllegalArgumentException("skip must be >= 0.0.");
}
XYSeries result = new XYSeries(name);
if (source.getItemCount(series) > 0) {
// if the initial averaging period is to be excluded, then
// calculate the lowest x-value to have an average calculated...
double first = source.getXValue(series, 0) + skip;
for (int i = source.getItemCount(series) - 1; i >= 0; i--) {
// get the current data item...
double x = source.getXValue(series, i);
if (x >= first) {
// work out the average for the earlier values...
int n = 0;
double sum = 0.0;
double limit = x - period;
int offset = 0;
boolean finished = false;
while (!finished) {
if ((i - offset) >= 0) {
double xx = source.getXValue(series, i - offset);
Number yy = source.getY(series, i - offset);
if (xx > limit) {
if (yy != null) {
sum = sum + yy.doubleValue();
n = n + 1;
}
}
else {
finished = true;
}
}
else {
finished = true;
}
offset = offset + 1;
}
if (n > 0) {
result.add(x, sum / n);
}
else {
result.add(x, null);
}
}
}
}
return result;
}
Example 19
| Source File: MovingAverage.java From SIMVA-SoS with Apache License 2.0 | 4 votes |
|
/**
* Creates a new {@link XYSeries} containing the moving averages of one
* series in the <code>source</code> dataset.
*
* @param source the source dataset.
* @param series the series index (zero based).
* @param name the name for the new series.
* @param period the averaging period.
* @param skip the length of the initial skip period.
*
* @return The dataset.
*/
public static XYSeries createMovingAverage(XYDataset source,
int series, String name, double period, double skip) {
ParamChecks.nullNotPermitted(source, "source");
if (period < Double.MIN_VALUE) {
throw new IllegalArgumentException("period must be positive.");
}
if (skip < 0.0) {
throw new IllegalArgumentException("skip must be >= 0.0.");
}
XYSeries result = new XYSeries(name);
if (source.getItemCount(series) > 0) {
// if the initial averaging period is to be excluded, then
// calculate the lowest x-value to have an average calculated...
double first = source.getXValue(series, 0) + skip;
for (int i = source.getItemCount(series) - 1; i >= 0; i--) {
// get the current data item...
double x = source.getXValue(series, i);
if (x >= first) {
// work out the average for the earlier values...
int n = 0;
double sum = 0.0;
double limit = x - period;
int offset = 0;
boolean finished = false;
while (!finished) {
if ((i - offset) >= 0) {
double xx = source.getXValue(series, i - offset);
Number yy = source.getY(series, i - offset);
if (xx > limit) {
if (yy != null) {
sum = sum + yy.doubleValue();
n = n + 1;
}
}
else {
finished = true;
}
}
else {
finished = true;
}
offset = offset + 1;
}
if (n > 0) {
result.add(x, sum / n);
}
else {
result.add(x, null);
}
}
}
}
return result;
}
Example 20
| Source File: LogXYItemLabelGenerator.java From pentaho-reporting with GNU Lesser General Public License v2.1 | 3 votes |
|
/**
* Creates the array of items that can be passed to the {@link java.text.MessageFormat} class for creating labels.
*
* @param dataset the dataset (<code>null</code> not permitted).
* @param series the series (zero-based index).
* @param item the item (zero-based index).
* @return An array of three items from the dataset formatted as <code>String</code> objects (never
* <code>null</code>).
*/
protected Object[] createItemArray( final XYDataset dataset, final int series, final int item ) {
final Object[] objects = super.createItemArray( dataset, series, item );
final Number value = dataset.getY( series, item );
objects[ 2 ] = LogCategoryItemLabelGenerator.formatValue( value );
return objects;
}
