CategoryDataset « Dataset « JFreeChart Q&A

1. How to set the CategoryDataset to my CategoryDatasetHandler    jfree.org

2. Performant CategoryDataset    jfree.org

I have about 200k rows in a table model (for upto 50k rows graphs come up just fine, FC4 x86_64 2GB). A few columns (1-N) need graphing and when I insert those values into the DefaultCategoryDataset it results in equal or greater number of Values2D entries and the JVM comes to grinding halt with 99% CPU utilization. I am seeing a ...

3. ChartFactory.createStackedAreaChart() with CategoryDataset ?    jfree.org

ChartFactory.createStackedAreaChart() with CategoryDataset ? by deepika Wed Nov 29, 2006 8:09 pm Hi Everyone, Here is something very simple, I am trying to do. I am trying to create a stacked area chart using ChartFactory.createStackedAreaChart() with CategoryDataset. But to my surprise, tooltip behaves very different compared to using ChartFactory.createAreaChart() with CategoryDataset. When I say it behaves different, I mean that ...

4. Can I represent mutiple lines in one CategoryDataset?    jfree.org

It all depends on how the dataset is implemented. In the case of the DefaultCategoryDataset class, you specify a row key and a column key for every value you add. The row key can be considered the "series" key. So when you populate the DefaultCategoryDataset, add values for more than one series.

5. CategoryDataset => Disable Sort Order    jfree.org

6. Removing items from a CategoryDataset    jfree.org

Hello, I have a chart that uses the following Datasets 1) DefaultBoxAndWhiskerDataset 2) DefaultCategoryDataset Based on user actions I need to remove items from both the datasets. (Both the datasets will always have the same number of items.) I see that the DefaultCategoryDataset has methods such as removeColumn, etc but the same methods are not available for the DefaultBoxAndWhiskerDataset. Is there ...

7. A problem for creating a CategoryDataset    jfree.org

Hi I am currently having trouble creating a CategoryDataset: this is part of my code: ... import org.jfree.data.category.CategoryDataset; import org.jfree.data.category.DefaultCategoryDataset; ... JFreeChart chart = ChartFactory.createLineChart("Vis","Experiment","Expression Level",dataset,PlotOrientation.VERTICAL,false,true,false); however, in JBuilder, it shows an error: createLineChart(java.lang.String,java.lang.String,java.lang,String,org.jfree.data.CategoryDataset,org.jfree.chart.plot.PlotOrientation,boolean,boolean)in org.jfree.chart.ChartFactory cannot be applied to (java.lang.String,java.lang.String,java.lang.String,org.jfree.data.category.CategoryDataset,org.free.chart.plot.PlotOrientation,boolean,boolean,boolean) I check the API: there is even not a class called: org.jfree.data.CategoryDataset And I do not import this class and definitely ...

8. CategoryDataSet    jfree.org

9. CategoryDataset w keys, GroupedStackedBarRenderer w indexes    jfree.org

The subject should be: "DefaultCategoryDataset uses Comparable keys for access to data, GroupedStackedBarRenderer uses int indexes for access to data". But the forum has a limit on the subject length. I'm trying to create a stacked bar chart. I'm having a hard time getting the colours of the items on the stacked groups to show up as the correct colour. My ...

10. CategoryDataset as a crosstab    jfree.org

Hello. I'm newbie and I'd like to give props to the JFreeChart team. Great tool, people! Here's my problem: I'm using JFreeChart to create a bar chart that is later inserted as a buffered image in a Jasper report. The chart data is provided by populating a DefaultCategoryDataset object. Currently, the final report is displaying the JFreeChart chart nicely, so no ...

11. CategoryDataset with notify boolean    jfree.org

Hi, everybody I would like to know If there is a way to make faster Line charts using a CategoryDataset (more than 1500 points). Using a Line Chart Based On An XYDataset instead, we have the "add" method that controls whether or not a SeriesChangeEvent is sent to all registered listeners with notify boolean. It would be nice if we could ...

12. highlow-values in CategoryDataset    jfree.org

13. Overlaying charts - problems by using CategoryDataset    jfree.org

Overlaying charts - problems by using CategoryDataset by DianaW Tue Aug 26, 2008 10:15 am Hello, I use JFreeChart(version 1.0.9) for the application I am creating. Following open issues I would like to come up to: The plot should display multiple line charts and a chart to display min/max-values. Both of these charttypes should be displayed in one plot. Following ...