add cateogory series method

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart01.java

@@ -16,6 +16,8 @@
  */
 package org.knowm.xchart.demo.charts.bar;
 
+import java.util.Arrays;
+
 import org.knowm.xchart.Chart;
 import org.knowm.xchart.ChartBuilder;
 import org.knowm.xchart.StyleManager.ChartType;
@@ -47,7 +49,7 @@ public class BarChart01 implements ExampleChart {
 
     // Create Chart
     Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("Score Histogram").xAxisTitle("Score").yAxisTitle("Number").build();
-    chart.addSeries("test 1", new double[] { 0, 1, 2, 3, 4 }, new double[] { 4, 5, 9, 6, 5 });
+    chart.addCategorySeries("test 1", Arrays.asList(new Integer[] { 0, 1, 2, 3, 4 }), Arrays.asList(new Integer[] { 4, 5, 9, 6, 5 }));
 
     // Customize Chart
     chart.getStyleManager().setLegendPosition(LegendPosition.InsideNW);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart02.java

@@ -75,7 +75,7 @@ public class BarChart02 implements ExampleChart {
       xData.add(date);
       yData.add(-1 * 0.00000001 * ((random.nextInt(i) + 1)));
     }
-    Series series = chart.addSeries("Model 77", xData, yData);
+    Series series = chart.addCategorySeries("Model 77", xData, yData);
     series.setLineColor(SeriesColor.RED);
     chart.getStyleManager().setPlotGridLinesVisible(false);
     chart.getStyleManager().setBarFilled(false);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart03.java

@@ -16,6 +16,8 @@
  */
 package org.knowm.xchart.demo.charts.bar;
 
+import java.util.Arrays;
+
 import org.knowm.xchart.Chart;
 import org.knowm.xchart.ChartBuilder;
 import org.knowm.xchart.StyleManager.ChartType;
@@ -45,7 +47,7 @@ public class BarChart03 implements ExampleChart {
 
     // Create Chart
     Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("Score vs. Age").xAxisTitle("Age").yAxisTitle("Score").build();
-    chart.addSeries("males", new double[] { 10, 20, 30, 40 }, new double[] { 40, -30, -20, -60 });
+    chart.addCategorySeries("males", Arrays.asList(new Integer[] { 10, 20, 30, 40 }), Arrays.asList(new Integer[] { 40, -30, -20, -60 }));
 
     return chart;
   }

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart04.java

@@ -16,6 +16,8 @@
  */
 package org.knowm.xchart.demo.charts.bar;
 
+import java.util.Arrays;
+
 import org.knowm.xchart.Chart;
 import org.knowm.xchart.ChartBuilder;
 import org.knowm.xchart.StyleManager.ChartType;
@@ -47,8 +49,8 @@ public class BarChart04 implements ExampleChart {
 
     // Create Chart
     Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("XFactor vs. Age").xAxisTitle("Age").yAxisTitle("XFactor").build();
-    chart.addSeries("female", new double[] { 10, 20, 30, 40, 50 }, new double[] { 50, 10, 20, 40, 35 });
-    chart.addSeries("male", new double[] { 10, 20, 30, 40, 50 }, new double[] { 40, 30, 20, 0, 60 });
+    chart.addCategorySeries("female", Arrays.asList(new Integer[] { 10, 20, 30, 40, 50 }), Arrays.asList(new Integer[] { 50, 10, 20, 40, 35 }));
+    chart.addCategorySeries("male", Arrays.asList(new Integer[] { 10, 20, 30, 40, 50 }), Arrays.asList(new Integer[] { 40, 30, 20, 0, 60 }));
 
     chart.getStyleManager().setYAxisMin(5);
     chart.getStyleManager().setYAxisMax(70);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart05.java

@@ -49,10 +49,10 @@ public class BarChart05 implements ExampleChart {
 
     // Create Chart
     Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("Temperature vs. Color").xAxisTitle("Color").yAxisTitle("Temperature").theme(ChartTheme.GGPlot2).build();
-    chart.addSeries("fish", new ArrayList<String>(Arrays.asList(new String[] { "Blue", "Red", "Green", "Yellow", "Yellow" })), new ArrayList<Number>(Arrays.asList(new Number[] { -40, 30, 20, 60,
-        60 })));
-    chart.addSeries("worms", new ArrayList<String>(Arrays.asList(new String[] { "Blue", "Red", "Green", "Yellow", "Yellow" })), new ArrayList<Number>(Arrays.asList(new Number[] { 50, 10, -20, 40,
-        60 })));
+    chart.addCategorySeries("fish", new ArrayList<String>(Arrays.asList(new String[] { "Blue", "Red", "Green", "Yellow", "Yellow" })), new ArrayList<Number>(Arrays.asList(new Number[] { -40, 30, 20,
+        60, 60 })));
+    chart.addCategorySeries("worms", new ArrayList<String>(Arrays.asList(new String[] { "Blue", "Red", "Green", "Yellow", "Yellow" })), new ArrayList<Number>(Arrays.asList(new Number[] { 50, 10, -20,
+        40, 60 })));
 
     return chart;
   }

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart06.java

@@ -53,8 +53,8 @@ public class BarChart06 implements ExampleChart {
 
     Histogram histogram1 = new Histogram(getGaussianData(10000), 30, -30, 30);
     Histogram histogram2 = new Histogram(getGaussianData(5000), 30, -30, 30);
-    chart.addSeries("histogram 1", histogram1.getxAxisData(), histogram1.getyAxisData());
-    chart.addSeries("histogram 2", histogram2.getxAxisData(), histogram2.getyAxisData());
+    chart.addCategorySeries("histogram 1", histogram1.getxAxisData(), histogram1.getyAxisData());
+    chart.addCategorySeries("histogram 2", histogram2.getxAxisData(), histogram2.getyAxisData());
 
     // Customize Chart
     chart.getStyleManager().setLegendPosition(LegendPosition.InsideNW);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart07.java

@@ -53,9 +53,9 @@ public class BarChart07 implements ExampleChart {
     Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("Score Histogram").xAxisTitle("Mean").yAxisTitle("Count").build();
 
     Histogram histogram1 = new Histogram(getGaussianData(1000), 10, -30, 30);
-    chart.addSeries("histogram 1", histogram1.getxAxisData(), histogram1.getyAxisData());
+    chart.addCategorySeries("histogram 1", histogram1.getxAxisData(), histogram1.getyAxisData());
     Histogram histogram2 = new Histogram(getGaussianData(1000), 10, -30, 30);
-    chart.addSeries("histogram 2", histogram2.getxAxisData(), histogram2.getyAxisData());
+    chart.addCategorySeries("histogram 2", histogram2.getxAxisData(), histogram2.getyAxisData());
 
     // Customize Chart
     chart.getStyleManager().setLegendPosition(LegendPosition.InsideNW);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart08.java

@@ -52,7 +52,7 @@ public class BarChart08 implements ExampleChart {
     Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("Histogram").xAxisTitle("Mean").yAxisTitle("Count").build();
 
     Histogram histogram1 = new Histogram(getGaussianData(10000), 10, -10, 10);
-    chart.addSeries("histogram", histogram1.getxAxisData(), histogram1.getyAxisData(), getFakeErrorData(histogram1.getxAxisData().size()));
+    chart.addCategorySeries("histogram", histogram1.getxAxisData(), histogram1.getyAxisData(), getFakeErrorData(histogram1.getxAxisData().size()));
 
     // Customize Chart
     chart.getStyleManager().setLegendPosition(LegendPosition.InsideNW);

xchart-demo/src/main/java/org/knowm/xchart/demo/charts/bar/BarChart09.java

@@ -51,9 +51,9 @@ public class BarChart09 implements ExampleChart {
 
     // Create Chart
     Chart chart = new ChartBuilder().chartType(ChartType.Bar).width(800).height(600).title("Value vs. Letter").xAxisTitle("Letter").yAxisTitle("Value").theme(ChartTheme.GGPlot2).build();
-    chart.addSeries("China", new ArrayList<String>(Arrays.asList(new String[] { "A", "B", "C", "D", "E" })), new ArrayList<Number>(Arrays.asList(new Number[] { 11, 23, 20, 36, 5 })));
-    Series series2 = chart.addSeries("World Ave.", new ArrayList<String>(Arrays.asList(new String[] { "A", "B", "C", "D", "E" })), new ArrayList<Number>(Arrays.asList(new Number[] { 13, 25, 22, 38,
-        7 })));
+    chart.addCategorySeries("China", new ArrayList<String>(Arrays.asList(new String[] { "A", "B", "C", "D", "E" })), new ArrayList<Number>(Arrays.asList(new Number[] { 11, 23, 20, 36, 5 })));
+    Series series2 = chart.addCategorySeries("World Ave.", new ArrayList<String>(Arrays.asList(new String[] { "A", "B", "C", "D", "E" })), new ArrayList<Number>(Arrays.asList(new Number[] { 13, 25,
+        22, 38, 7 })));
     series2.setSeriesType(SeriesType.Line);
 
     // Customize Chart

xchart/src/main/java/org/knowm/xchart/Chart.java

@@ -106,7 +106,7 @@ public class Chart {
   }
 
   /**
-   * Add a Number series to the chart using Collections with error bars
+   * Add a series for a X-Y type chart using Lists with error bars
    *
    * @param seriesName
    * @param xData the X-Axis data
@@ -120,7 +120,7 @@ public class Chart {
   }
 
   /**
-   * Add a series to the chart using Collections
+   * Add a series for a X-Y type chart using Lists
    *
    * @param seriesName
    * @param xData the X-Axis data
@@ -133,7 +133,34 @@ public class Chart {
   }
 
   /**
-   * Add a series to the chart using double arrays
+   * Add a series for a Category type chart using Lists with error bars
+   *
+   * @param seriesName
+   * @param xData the X-Axis data
+   * @param yData the Y-Axis data
+   * @param errorBars the error bar data
+   * @return A Series object that you can set properties on
+   */
+  public Series addCategorySeries(String seriesName, List<?> xData, List<? extends Number> yData, List<? extends Number> errorBars) {
+
+    return chartInternal.addCategorySeries(seriesName, xData, yData, errorBars);
+  }
+
+  /**
+   * Add a series for a Category type chart using Lists
+   *
+   * @param seriesName
+   * @param xData the X-Axis data
+   * @param yData the Y-Axis data
+   * @return A Series object that you can set properties on
+   */
+  public Series addCategorySeries(String seriesName, List<?> xData, List<? extends Number> yData) {
+
+    return addCategorySeries(seriesName, xData, yData, null);
+  }
+
+  /**
+   * Add a series for a X-Y type chart using using double arrays
    *
    * @param seriesName
    * @param xData the X-Axis data
@@ -146,7 +173,7 @@ public class Chart {
   }
 
   /**
-   * Add a series to the chart using double arrays with error bars
+   * Add a series for a X-Y type chart using using double arrays with error bars
    *
    * @param seriesName
    * @param xData the X-Axis data
@@ -179,7 +206,7 @@ public class Chart {
   }
 
   /**
-   * Add a series to the chart using int arrays
+   * Add a series for a X-Y type chart using using int arrays
    *
    * @param seriesName
    * @param xData the X-Axis data
@@ -192,7 +219,7 @@ public class Chart {
   }
 
   /**
-   * Add a series to the chart using int arrays with error bars
+   * Add a series for a X-Y type chart using using int arrays with error bars
    *
    * @param seriesName
    * @param xData the X-Axis data

xchart/src/main/java/org/knowm/xchart/internal/chartpart/Axis.java

@@ -24,6 +24,7 @@ import java.awt.geom.AffineTransform;
 import java.awt.geom.Rectangle2D;
 
 import org.knowm.xchart.StyleManager.LegendPosition;
+import org.knowm.xchart.internal.chartpart.ChartInternal.ChartInternalType;
 
 /**
  * Axis
@@ -342,24 +343,25 @@ public class Axis implements ChartPart {
 
   private AxisTickCalculator getAxisTickCalculator(double workingSpace) {
 
-    if (getDirection() == Direction.X && getAxisType() == AxisType.String) {
+    if (getDirection() == Direction.X && getChartInternal().getChartInternalType() == ChartInternalType.Category) {
 
       return new AxisTickCategoryChartCalculator(getDirection(), workingSpace, getMin(), getMax(), getChartInternal());
 
     }
-    else if (getDirection() == Direction.X && getChartInternal().getStyleManager().isXAxisLogarithmic() && getAxisType() != AxisType.Date) {
+    else if (getChartInternal().getChartInternalType() == ChartInternalType.XY && getAxisType() == AxisType.Date) {
 
-      return new AxisTickLogarithmicCalculator(getDirection(), workingSpace, getMin(), getMax(), getChartInternal().getStyleManager());
+      return new AxisTickDateCalculator(getDirection(), workingSpace, getMin(), getMax(), getChartInternal().getStyleManager());
 
     }
-    else if (getDirection() == Direction.Y && getChartInternal().getStyleManager().isYAxisLogarithmic() && getAxisType() != AxisType.Date) {
+    else if (getDirection() == Direction.X && getChartInternal().getChartInternalType() == ChartInternalType.XY && getChartInternal().getStyleManager().isXAxisLogarithmic()
+        && getAxisType() != AxisType.Date) {
 
       return new AxisTickLogarithmicCalculator(getDirection(), workingSpace, getMin(), getMax(), getChartInternal().getStyleManager());
 
     }
-    else if (getAxisType() == AxisType.Date) {
+    else if (getDirection() == Direction.Y && getChartInternal().getStyleManager().isYAxisLogarithmic() && getAxisType() != AxisType.Date) {
 
-      return new AxisTickDateCalculator(getDirection(), workingSpace, getMin(), getMax(), getChartInternal().getStyleManager());
+      return new AxisTickLogarithmicCalculator(getDirection(), workingSpace, getMin(), getMax(), getChartInternal().getStyleManager());
 
     }
     else { // number

xchart/src/main/java/org/knowm/xchart/internal/chartpart/ChartInternal.java

@@ -40,6 +40,13 @@ public class ChartInternal {
   private int width;
   private int height;
 
+  protected enum ChartInternalType {
+
+    XY, Category
+  }
+
+  private ChartInternalType chartInternalType = null;
+
   private Map<String, Series> seriesMap = new LinkedHashMap<String, Series>();
   private SeriesColorMarkerLineStyleCycler seriesColorMarkerLineStyleCycler = new SeriesColorMarkerLineStyleCycler();
 
@@ -79,23 +86,13 @@ public class ChartInternal {
    */
   public Series addSeries(String seriesName, List<?> xData, List<? extends Number> yData, List<? extends Number> errorBars) {
 
-    // Sanity checks
-    if (seriesName == null) {
-      throw new IllegalArgumentException("Series Name cannot be null!!!");
-    }
-    if (yData == null) {
-      throw new IllegalArgumentException("Y-Axis data cannot be null!!!");
-    }
-    if (yData.size() == 0) {
-      throw new IllegalArgumentException("Y-Axis data cannot be empty!!!");
-    }
-    if (xData != null && xData.size() == 0) {
-      throw new IllegalArgumentException("X-Axis data cannot be empty!!!");
-    }
-    // Sanity check
-    if (errorBars != null && errorBars.size() != yData.size()) {
-      throw new IllegalArgumentException("errorbars and Y-Axis sizes are not the same!!!");
+    if (chartInternalType != null && chartInternalType != ChartInternalType.XY) {
+      throw new IllegalArgumentException("Cannot mix x-y and category series types! Don't call addSeries() and addCategorySeries() for the same chart!");
     }
+    chartInternalType = ChartInternalType.XY;
+
+    // Sanity checks
+    sanityCheck(seriesName, xData, yData, errorBars);
 
     Series series = null;
     if (xData != null) {
@@ -104,21 +101,13 @@ public class ChartInternal {
       if (xData.size() != yData.size()) {
         throw new IllegalArgumentException("X and Y-Axis sizes are not the same!!!");
       }
-      // inspect the series to see what kind of data it contains (Number, Date or String)
-      Iterator<?> itr = xData.iterator();
-      Object dataPoint = itr.next();
-      if (dataPoint instanceof Number) {
-        axisPair.getXAxis().setAxisType(AxisType.Number);
-      }
-      else if (dataPoint instanceof Date) {
-        axisPair.getXAxis().setAxisType(AxisType.Date);
-      }
-      else if (dataPoint instanceof String) {
-        axisPair.getXAxis().setAxisType(AxisType.String);
-      }
-      else {
-        throw new IllegalArgumentException("Series data must be either Number, Date or String type!!!");
+
+      // inspect the series to see what kind of data it contains (Number, Date)
+      AxisType axisType = setXAxisType(xData);
+      if (!(axisType == AxisType.Number || axisType == AxisType.Date)) {
+        throw new IllegalArgumentException("X-Axis data must be of type Number or Date!!!");
       }
+
       axisPair.getYAxis().setAxisType(AxisType.Number);
       series = new Series(seriesName, xData, axisPair.getXAxis().getAxisType(), yData, axisPair.getYAxis().getAxisType(), errorBars, seriesColorMarkerLineStyleCycler
           .getNextSeriesColorMarkerLineStyle());
@@ -134,7 +123,117 @@ public class ChartInternal {
           .getNextSeriesColorMarkerLineStyle());
     }
 
-    // set series type based on chart type, but only if it's not explicitly set on the series yet.
+    // set series type
+    setSeriesType(series);
+
+    if (seriesMap.keySet().contains(seriesName)) {
+      throw new IllegalArgumentException("Series name >" + seriesName + "< has already been used. Use unique names for each series!!!");
+    }
+
+    seriesMap.put(seriesName, series);
+
+    return series;
+  }
+
+  /**
+   * @param seriesName
+   * @param xData
+   * @param yData
+   * @param errorBars
+   * @return Series
+   */
+  public Series addCategorySeries(String seriesName, List<?> xData, List<? extends Number> yData, List<? extends Number> errorBars) {
+
+    if (chartInternalType != null && chartInternalType != ChartInternalType.Category) {
+      throw new IllegalArgumentException("Cannot mix x-y and category series types! Don't call addSeries() and addCategorySeries() for the same chart!");
+    }
+    chartInternalType = ChartInternalType.Category;
+
+    // Sanity checks
+    sanityCheck(seriesName, xData, yData, errorBars);
+    if (xData == null) {
+      throw new IllegalArgumentException("Y-Axis data cannot be null!!!");
+    }
+    if (xData.size() != yData.size()) {
+      throw new IllegalArgumentException("X and Y-Axis sizes are not the same!!!");
+    }
+
+    // inspect the series to see what kind of data it contains (Number, Date, String)
+    setXAxisType(xData);
+
+    axisPair.getYAxis().setAxisType(AxisType.Number);
+    Series series = new Series(seriesName, xData, axisPair.getXAxis().getAxisType(), yData, axisPair.getYAxis().getAxisType(), errorBars, seriesColorMarkerLineStyleCycler
+        .getNextSeriesColorMarkerLineStyle());
+
+    // set series type
+    setSeriesType(series);
+
+    if (seriesMap.keySet().contains(seriesName)) {
+      throw new IllegalArgumentException("Series name >" + seriesName + "< has already been used. Use unique names for each series!!!");
+    }
+
+    seriesMap.put(seriesName, series);
+
+    return series;
+  }
+
+  private void sanityCheck(String seriesName, List<?> xData, List<? extends Number> yData, List<? extends Number> errorBars) {
+
+    if (seriesName == null) {
+      throw new IllegalArgumentException("Series Name cannot be null!!!");
+    }
+    if (yData == null) {
+      throw new IllegalArgumentException("Y-Axis data cannot be null!!!");
+    }
+    if (yData.size() == 0) {
+      throw new IllegalArgumentException("Y-Axis data cannot be empty!!!");
+    }
+    if (xData != null && xData.size() == 0) {
+      throw new IllegalArgumentException("X-Axis data cannot be empty!!!");
+    }
+    if (errorBars != null && errorBars.size() != yData.size()) {
+      throw new IllegalArgumentException("errorbars and Y-Axis sizes are not the same!!!");
+    }
+
+  }
+
+  /**
+   * Sets the axis type based on the data contained in the xData argument
+   *
+   * @param xData
+   * @return
+   */
+  private AxisType setXAxisType(List<?> xData) {
+
+    AxisType axisType;
+
+    Iterator<?> itr = xData.iterator();
+    Object dataPoint = itr.next();
+    if (dataPoint instanceof Number) {
+      axisType = AxisType.Number;
+      axisPair.getXAxis().setAxisType(axisType);
+    }
+    else if (dataPoint instanceof Date) {
+      axisType = AxisType.Date;
+      axisPair.getXAxis().setAxisType(axisType);
+    }
+    else if (dataPoint instanceof String) {
+      axisType = AxisType.String;
+      axisPair.getXAxis().setAxisType(axisType);
+    }
+    else {
+      throw new IllegalArgumentException("Series data must be either Number, Date or String type!!!");
+    }
+    return axisType;
+  }
+
+  /**
+   * set series type based on chart type, but only if it's not explicitly set on the series yet.
+   *
+   * @param series
+   */
+  private void setSeriesType(Series series) {
+
     switch (getStyleManager().getChartType()) {
     case Line:
       if (series.getSeriesType() == null) {
@@ -152,6 +251,7 @@ public class ChartInternal {
       }
       break;
     case Bar:
+      // TODO Not Yet Supported
       if (series.getSeriesType() == null) {
         series.setSeriesType(Series.SeriesType.Bar);
       }
@@ -162,14 +262,6 @@ public class ChartInternal {
       }
       break;
     }
-
-    if (seriesMap.keySet().contains(seriesName)) {
-      throw new IllegalArgumentException("Series name >" + seriesName + "< has already been used. Use unique names for each series!!!");
-    }
-
-    seriesMap.put(seriesName, series);
-
-    return series;
   }
 
   /**
@@ -247,7 +339,7 @@ public class ChartInternal {
    *
    * @return
    */
-  public Legend getChartLegend() {
+  protected Legend getChartLegend() {
 
     return chartLegend;
   }
@@ -267,11 +359,16 @@ public class ChartInternal {
    *
    * @return
    */
-  public Plot getPlot() {
+  protected Plot getPlot() {
 
     return plot;
   }
 
+  public ChartInternalType getChartInternalType() {
+
+    return chartInternalType;
+  }
+
   public int getWidth() {
 
     return width;