Develop Reference

BoxandWhisper not plotting the whisker for some values

Box and whisper not plotting the lines for some values
Out of 5 lines I see only one sometimes. Please tell me the scenario where I get the far or low triangles
DefaultBoxAndWhiskerCategoryDataset dataset = new DefaultBoxAndWhiskerCategoryDataset();
List<Double> values = new ArrayList();
values.add(14);
values.add(14);
values.add(14);
values.add(14);
dataset.add(values, "","");
BoxAndWhiskerRenderer r = new BoxAndWhiskerRenderer();
CategoryPlot plot = new CategoryPlot(dataset, new CategoryAxis("x"),
new NumberAxis("y"), r);
JFreeChart chart = new JFreeChart(plot);
Mean is same as q1 so it's not coming

POI bar chart generate one series has question

I use JDK8 and POI-4.1.0 use they example here a link
export chart to Word .when create two series is ok two series img,
but I only create one series .the chart mistake category for series one series img
"lang1" "lang2" "lang3" is category name but they become series name.
i have no ideal. I also find use line chart have the same problem
my code
public static void main(String[] args) throws Exception {
List<String> listLanguages = new ArrayList<>(3);
listLanguages.add("lang1");listLanguages.add("lang2");listLanguages.add("lang3");
List<Double> listCountries = new ArrayList<>(3);
listCountries.add(10d);listCountries.add(20d);listCountries.add(30d);
List<Double> listSpeakers = new ArrayList<>(3);
listSpeakers.add(14d);listSpeakers.add(25d);listSpeakers.add(33d);
String[] categories = listLanguages.toArray(new String[listLanguages.size()]);
Double[] values1 = listCountries.toArray(new Double[listCountries.size()]);
Double[] values2 = listSpeakers.toArray(new Double[listSpeakers.size()]);
try (XWPFDocument doc = new XWPFDocument()) {
XWPFChart chart = doc.createChart(5000000, 4000000);
XDDFChartAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);
final int numOfPoints = categories.length;
final String categoryDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 0, 0));
final String valuesDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 1, 1));
final String valuesDataRange2 = chart.formatRange(new CellRangeAddress(1, numOfPoints, 2, 2));
final XDDFDataSource<?> categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange, 0);
final XDDFNumericalDataSource<? extends Number> valuesData = XDDFDataSourcesFactory.fromArray(values1, valuesDataRange, 1);
final XDDFNumericalDataSource<? extends Number> valuesData2 = XDDFDataSourcesFactory.fromArray(values2, valuesDataRange2, 2);
XDDFBarChartData bar = (XDDFBarChartData) chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);
XDDFBarChartData.Series series1 = (XDDFBarChartData.Series) bar.addSeries(categoriesData, valuesData);
series1.setTitle("a",chart.setSheetTitle("a", 1));
//XDDFBarChartData.Series series2 = (XDDFBarChartData.Series) bar.addSeries(categoriesData, valuesData2);
//series2.setTitle("b",chart.setSheetTitle("b", 2));
bar.setVaryColors(true);
bar.setBarDirection(BarDirection.COL);
chart.plot(bar);
XDDFChartLegend legend = chart.getOrAddLegend();
legend.setPosition(LegendPosition.LEFT);
// legend.setOverlay(false);
try (OutputStream out = new FileOutputStream("C:/Users/lyf/Desktop/barExample.docx")) {
doc.write(out);
}
}
catch(Exception e)
{
}
}

The main problem is that setting setVaryColors to true means the following:
If only one series, then do varying the colors for each data point of the series. Then the legend shows the varying data points instead of the series. If more than one series, then do varying the colors for each series. Then the legend shows the varying series.
So we need set setVaryColors to false if only one series is present.
But additional we need set AxisCrossBetween, so the left axis crosses the category axis between the categories. Else first and last category is exactly on cross points and the bars are only half visible.
And at last, XDDF is only half ready at the moment and there are many bugs. For example XDDFChart.setSheetTitle is buggy. It creates a Table but only half way and incomplete. Excel cannot opening the workbook after creating that incomplete Table. So updating the chart data in Word is not possible.
The following code works for me and can create a chart with only one series as well as with two. Additional I have tried making the code more structured in single steps. Each step is commented on what it is doing.
import java.io.*;
import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.ss.util.*;
import org.apache.poi.util.Units;
import org.apache.poi.xddf.usermodel.*;
import org.apache.poi.xddf.usermodel.chart.*;
import org.apache.poi.xssf.usermodel.*;
public class CreateWordXDDFChart {
// Methode to set title in the data sheet without creating a Table but using the sheet data only.
// Creating a Table is not really necessary.
static CellReference setTitleInDataSheet(XWPFChart chart, String title, int column) throws Exception {
XSSFWorkbook workbook = chart.getWorkbook();
XSSFSheet sheet = workbook.getSheetAt(0);
XSSFRow row = sheet.getRow(0); if (row == null) row = sheet.createRow(0);
XSSFCell cell = row.getCell(column); if (cell == null) cell = row.createCell(column);
cell.setCellValue(title);
return new CellReference(sheet.getSheetName(), 0, column, true, true);
}
public static void main(String[] args) throws Exception {
try (XWPFDocument document = new XWPFDocument()) {
// create the data
String[] categories = new String[]{"Lang 1", "Lang 2", "Lang 3"};
Double[] valuesA = new Double[]{10d, 20d, 30d};
Double[] valuesB = new Double[]{15d, 25d, 35d};
// create the chart
XWPFChart chart = document.createChart(15*Units.EMU_PER_CENTIMETER, 10*Units.EMU_PER_CENTIMETER);
// create data sources
int numOfPoints = categories.length;
String categoryDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 0, 0));
String valuesDataRangeA = chart.formatRange(new CellRangeAddress(1, numOfPoints, 1, 1));
String valuesDataRangeB = chart.formatRange(new CellRangeAddress(1, numOfPoints, 2, 2));
XDDFDataSource<String> categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange, 0);
XDDFNumericalDataSource<Double> valuesDataA = XDDFDataSourcesFactory.fromArray(valuesA, valuesDataRangeA, 1);
XDDFNumericalDataSource<Double> valuesDataB = XDDFDataSourcesFactory.fromArray(valuesB, valuesDataRangeB, 2);
// create axis
XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
// Set AxisCrossBetween, so the left axis crosses the category axis between the categories.
// Else first and last category is exactly on cross points and the bars are only half visible.
leftAxis.setCrossBetween(AxisCrossBetween.BETWEEN);
// create chart data
XDDFChartData data = chart.createData(ChartTypes.BAR, bottomAxis, leftAxis);
((XDDFBarChartData)data).setBarDirection(BarDirection.COL);
// create series
// if only one series do not vary colors for each bar
((XDDFBarChartData)data).setVaryColors(false);
XDDFChartData.Series series = data.addSeries(categoriesData, valuesDataA);
// XDDFChart.setSheetTitle is buggy. It creates a Table but only half way and incomplete.
// Excel cannot opening the workbook after creatingg that incomplete Table.
// So updating the chart data in Word is not possible.
//series.setTitle("a", chart.setSheetTitle("a", 1));
series.setTitle("a", setTitleInDataSheet(chart, "a", 1));
/*
// if more than one series do vary colors of the series
((XDDFBarChartData)data).setVaryColors(true);
series = data.addSeries(categoriesData, valuesDataB);
//series.setTitle("b", chart.setSheetTitle("b", 2));
series.setTitle("b", setTitleInDataSheet(chart, "b", 2));
*/
// plot chart data
chart.plot(data);
// create legend
XDDFChartLegend legend = chart.getOrAddLegend();
legend.setPosition(LegendPosition.LEFT);
legend.setOverlay(false);
// Write the output to a file
try (FileOutputStream fileOut = new FileOutputStream("CreateWordXDDFChart.docx")) {
document.write(fileOut);
}
}
}
}

How do I add a second line with a SECOND AXIS to an XDDFChart in POI 4.0.1?

I am unable to add a line on a second axis (right axis) on an existing chart. Is there a way to do this with the new implementation of Charts in POI 4.0.0/1?
Desired output will look like this (A simple excel chart with 2 axes):
. The associated data to that chart as an example:
Series 1/Axis1 = [1, 2, 3, 4, 5, 6, 7, 8, 9]
Series 2/Axis2 = [200,300,400,500,600,700,800,900,1000]
Here is the code that I am trying so far in Java, it is mostly replicated from the LineChart.java example
//Initial code instantiates a document
XWPFDocument doc = new XWPFDocument();
...
// Generate Chart
// This was taken from the example https://svn.apache.org/repos/asf/poi/trunk/src/examples/src/org/apache/poi/xssf/usermodel/examples/LineChart.java
XWPFChart prChart = doc.createChart();
//Values 1 on the Left Axis
//Values 2 on the Right Axis
String[] categories = dates.toArray(new String[dates.size()]);
BigDecimal[] values1 = prices1.toArray(new BigDecimal[prices1.size()]);
BigDecimal[] values2 = prices2.toArray(new BigDecimal[prices2.size()]);
XDDFChartAxis bottomAxis = prChart.createCategoryAxis(AxisPosition.BOTTOM);
bottomAxis.setMajorTickMark(AxisTickMark.NONE);
XDDFValueAxis leftAxis = prChart.createValueAxis(AxisPosition.LEFT);
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
leftAxis.setMajorTickMark(AxisTickMark.OUT);
/*
* Is this made correctly?
*/
XDDFValueAxis rightAxis = prChart.createValueAxis(AxisPosition.RIGHT);
rightAxis.setCrosses(AxisCrosses.MAX);
rightAxis.setMajorTickMark(AxisTickMark.IN);
final int numOfPoints = categories.length;
final String categoryDataRange = prChart.formatRange(new CellRangeAddress(1, numOfPoints, 0, 0));
final String valuesDataRange = prChart.formatRange(new CellRangeAddress(1, numOfPoints, 1, 1));
final String valuesDataRange2 = prChart.formatRange(new CellRangeAddress(1, numOfPoints, 2, 2));
final XDDFDataSource<?> categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange, 0);
final XDDFNumericalDataSource<? extends Number> valuesData = XDDFDataSourcesFactory.fromArray(values1, valuesDataRange, 1);
final XDDFNumericalDataSource<? extends Number> valuesData2 = XDDFDataSourcesFactory.fromArray(values2, valuesDataRange2, 2);
XDDFLineChartData line = (XDDFLineChartData) prChart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
XDDFLineChartData.Series series1 = (XDDFLineChartData.Series) line.addSeries(categoriesData, valuesData);
series1.setTitle("Price", null);
series1.setSmooth(true);
series1.setMarkerStyle(MarkerStyle.NONE);
solidLineSeries(series1, PresetColor.BLUE_VIOLET);
// Am I adding the rightAxis correctly here?
XDDFLineChartData line2 = (XDDFLineChartData) prChart.createData(ChartTypes.LINE, bottomAxis, rightAxis);
XDDFLineChartData.Series series2 = (XDDFLineChartData.Series) line2.addSeries(categoriesData, valuesData2);
series2.setTitle("Index", null);
series2.setSmooth(true);
series2.setMarkerStyle(MarkerStyle.NONE);
solidLineSeries(series2, PresetColor.BLACK);
prChart.plot(line);
prChart.plot(line2); /// <- Does this add to the same plot correctly?
prChart.displayBlanksAs(DisplayBlanks.GAP);
Running this code doesn't produce any compile errors. But I do get errors when opening the document "Problem with its' contents."
I suppose I am not adding the 2nd line and 2nd axes correctly.
Is there a way to accomplish this?
Update w. Solution
Axel's solution below works perfectly. The additional info to know is exactly what was the issue.
I would also like to recognize the order in which you add to the plot, this will hopefully help others
Create first set of axis
Create first Line
Plot first Line
Create new Axis
Create 2nd line
Plot 2nd line
Update the axis ids!

When it comes to multiple different value axes in one chart, this is not fully implemented in XDDF until now. So we need correcting something using the low level ooxml-schemas-1.4 classes.
Needed knowledge:
In principle the series which shall be shown on second value axis are in a separate chart in the same plot area. So the series which shall be shown on second value axis needs it's own bottom axis too. But this bottom axis must be invisible.
Both the axes, the second bottom and the new right axis, must cross each other properly. This crossing apache poi does not properly until now. So we must correct here.
Because while adding to the chart, the apache poi code which adds the second line chart does not knows something about the already present line chart, it's IDs starts with 0 again. But this is wrong for an combined chart. So we need correct the id and order. It must not start with 0 again because there is a line series already in same plot area.
Complete example to be reproducible for others too:
import java.io.*;
import org.apache.poi.xwpf.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.util.Units;
import org.apache.poi.xddf.usermodel.*;
import org.apache.poi.xddf.usermodel.chart.*;
public class CreateWordXDDFChart {
public static void main(String[] args) throws Exception {
try (XWPFDocument document = new XWPFDocument()) {
// create the data
String[] categories = new String[]{"1","2","3","4","5","6","7","8","9"};
Double[] values1 = new Double[]{1d,2d,3d,4d,5d,6d,7d,8d,9d};
Double[] values2 = new Double[]{200d,300d,400d,500d,600d,700d,800d,900d,1000d};
// create the chart
XWPFChart chart = document.createChart(15*Units.EMU_PER_CENTIMETER, 10*Units.EMU_PER_CENTIMETER);
// create data sources
int numOfPoints = categories.length;
String categoryDataRange = chart.formatRange(new CellRangeAddress(1, numOfPoints, 0, 0));
String valuesDataRange1 = chart.formatRange(new CellRangeAddress(1, numOfPoints, 1, 1));
String valuesDataRange2 = chart.formatRange(new CellRangeAddress(1, numOfPoints, 2, 2));
XDDFDataSource<String> categoriesData = XDDFDataSourcesFactory.fromArray(categories, categoryDataRange, 0);
XDDFNumericalDataSource<Double> valuesData1 = XDDFDataSourcesFactory.fromArray(values1, valuesDataRange1, 1);
XDDFNumericalDataSource<Double> valuesData2 = XDDFDataSourcesFactory.fromArray(values2, valuesDataRange2, 2);
// first line chart
XDDFCategoryAxis bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
XDDFValueAxis leftAxis = chart.createValueAxis(AxisPosition.LEFT);
leftAxis.setCrosses(AxisCrosses.AUTO_ZERO);
XDDFChartData data = chart.createData(ChartTypes.LINE, bottomAxis, leftAxis);
XDDFChartData.Series series = data.addSeries(categoriesData, valuesData1);
chart.plot(data);
solidLineSeries(data, 0, PresetColor.BLUE);
// second line chart
// bottom axis must be there but must not be visible
bottomAxis = chart.createCategoryAxis(AxisPosition.BOTTOM);
bottomAxis.setVisible(false);
XDDFValueAxis rightAxis = chart.createValueAxis(AxisPosition.RIGHT);
rightAxis.setCrosses(AxisCrosses.MAX);
// set correct cross axis
bottomAxis.crossAxis(rightAxis);
rightAxis.crossAxis(bottomAxis);
data = chart.createData(ChartTypes.LINE, bottomAxis, rightAxis);
series = data.addSeries(categoriesData, valuesData2);
chart.plot(data);
// correct the id and order, must not be 0 again because there is one line series already
chart.getCTChart().getPlotArea().getLineChartArray(1).getSerArray(0).getIdx().setVal(1);
chart.getCTChart().getPlotArea().getLineChartArray(1).getSerArray(0).getOrder().setVal(1);
solidLineSeries(data, 0, PresetColor.RED);
// Write the output to a file
try (FileOutputStream fileOut = new FileOutputStream("CreateWordXDDFChart.docx")) {
document.write(fileOut);
}
}
}
private static void solidLineSeries(XDDFChartData data, int index, PresetColor color) {
XDDFSolidFillProperties fill = new XDDFSolidFillProperties(XDDFColor.from(color));
XDDFLineProperties line = new XDDFLineProperties();
line.setFillProperties(fill);
XDDFChartData.Series series = data.getSeries().get(index);
XDDFShapeProperties properties = series.getShapeProperties();
if (properties == null) {
properties = new XDDFShapeProperties();
}
properties.setLineProperties(line);
series.setShapeProperties(properties);
}
}

How to show zoomed graph with minimum bars with defined bar size using MPAndroid chart?

I have created one graph which shows strings at x axis and dollars at y axis. I am able to see the values on graph but my data is too much to show on graph.
Graph is scrollable so I want to show minimun number of values on bar like below graph.
But now I am getting too much bars in graph like this:
This is my code:
public void setGraph() {
if (sessionData.getString("graphType", "").equals("d") || sessionData.getString("graphType", "").equals("m"))
{
int index = 0;
String[] dates = new String[totalOrdersList.size()];
mChart.setDrawBarShadow(false);
mChart.setDrawValueAboveBar(false);
mChart.getDescription().setEnabled(false);
mChart.setBackgroundColor(ContextCompat.getColor(getActivity(), R.color.lightGrey));
// mChart.setScaleEnabled(false);
// if more than 60 entries are displayed in the chart, no values will be
// drawn
mChart.setMaxVisibleValueCount(60);
// scaling can now only be done on x- and y-axis separately
mChart.setPinchZoom(false);
mChart.setDrawGridBackground(false);
// mChart.setDrawYLabels(false);
IndexAxisValueFormatter xAxisFormatter = new IndexAxisValueFormatter(dates);
XAxis xAxis = mChart.getXAxis();
xAxis.setPosition(XAxis.XAxisPosition.BOTTOM);
xAxis.setDrawGridLines(false);
xAxis.setLabelCount(3);
xAxis.setValueFormatter(xAxisFormatter);
xAxis.setGranularity(1f);
com.github.mikephil.charting.formatter.IAxisValueFormatter custom = new MyAxisValueFormatter();
YAxis leftAxis = mChart.getAxisLeft();
leftAxis.setLabelCount(8, false);
leftAxis.setValueFormatter(custom);
leftAxis.setPosition(YAxis.YAxisLabelPosition.OUTSIDE_CHART);
leftAxis.setSpaceTop(15f);
leftAxis.setAxisMinimum(0f); // this replaces setStartAtZero(true)
YAxis rightAxis = mChart.getAxisRight();
rightAxis.setDrawGridLines(false);
rightAxis.setLabelCount(8, false);
rightAxis.setValueFormatter(custom);
rightAxis.setSpaceTop(15f);
rightAxis.setAxisMinimum(0f);
rightAxis.setEnabled(false);
// this replaces setStartAtZero(true)
Legend l = mChart.getLegend();
l.setVerticalAlignment(Legend.LegendVerticalAlignment.BOTTOM);
l.setHorizontalAlignment(Legend.LegendHorizontalAlignment.LEFT);
l.setOrientation(Legend.LegendOrientation.HORIZONTAL);
l.setDrawInside(false);
l.setForm(Legend.LegendForm.SQUARE);
l.setFormSize(9f);
l.setTextSize(11f);
l.setXEntrySpace(4f);
ArrayList<BarEntry> barEntries = new ArrayList<>();
for (Order o : totalOrdersList) {
dates[index] = o.getDate();
barEntries.add(new BarEntry(index, Float.parseFloat(o.getAmount())));
index++;
}
BarDataSet set1 = new BarDataSet(barEntries, "Months");
set1.setValues(barEntries);
set1.setColor(ContextCompat.getColor(getActivity(), R.color.orange));
ArrayList<IBarDataSet> dataSets = new ArrayList<IBarDataSet>();
dataSets.add(set1);
BarData data = new BarData(dataSets);
data.setValueTextSize(10f);
data.setBarWidth(0.9f);
mChart.setData(data);
mChart.animateXY(3000, 3000);
}
Please help.. Thank you..

Changing the grid colour of a GraphView object in Android

I've added a GraphView object and populated it with some data as per the example in the documentation on the website. While I've found out how to change the background colour of the GraphView, I have no idea how to change the grid colour. Any ideas?
This is what I've tried:
public void createGraph(View view){
GraphView graph = (GraphView) view.findViewById(R.id.graph);
GridLabelRenderer gridLabelRenderer = graph.getGridLabelRenderer();
// This works
graph.setBackgroundColor(getResources().getColor(android.R.color.holo_green_light));
// This does not work
gridLabelRenderer.setGridColor(getResources().getColor(android.R.color.holo_green_light));
// Nor does this
//gridLabelRenderer.setGridColor(15);
// This works
LineGraphSeries<DataPoint> series = new LineGraphSeries<DataPoint>(new DataPoint[] {
new DataPoint(0, 1),
new DataPoint(1, 5),
new DataPoint(2, 3),
new DataPoint(3, 2),
new DataPoint(4, 6)
});
graph.addSeries(series);
}

try
graph.getGridLabelRenderer().reloadStyles();
styling example it here
https://github.com/appsthatmatter/GraphView-Demos/blob/master/app/src/main/java/com/jjoe64/graphview_demos/examples/StylingColors.java