jfreechart

is it possible to connect one point to all others around in JFreeChart here how it should looks so all the points around connected to X point chart.setBackgroundPaint(Color.white); final XYPlot plot = chart.getXYPlot(); plot.setBackgroundPaint(Color.lightGray); plot.setDomainGridlinePaint(Color.white); plot.setRangeGridlinePaint(Color.white); Shape cross = ShapeUtilities.createDiagonalCross(3, 1); Shape somehing = ShapeUtilities.createDiamond(4); final XYLineAndShapeRenderer renderer = new XYLineAndShapeRenderer(); renderer.setSeriesLinesVisible(0, false); renderer.setSeriesLinesVisible(1,

I have a problem with data labels to align with correct bar in this chart. This bar chart is generated using jfreechart in jsp. This is a pretty common mistake in JFreeChart. Each category in your chart ('abc', 'xyz' etc) has a value for each of the 6 series ('q1', 'q2' ... 'q6'), so there are 36 data items in all. But 30 of those data items are null, because you didn't specify them. JFreeChart leaves a space where the bar would appear, when the data value is null. If you really have only six data values, you should have one series with 6 categories, or one category and six series. The simple

How to get all the points (x,y) lying on the line connecting two data-points in a chart in jfreechart ?. In a chart, as we point to the end-points of the line, it shows the x & y coordinates. Can't we get the coordinates at any point on the line (via code)? As you have two points, use the formulae of a linear equation to obtain the slope and intercept of the line. Once you have the equation, you can evaluate it at any point. Addendum: The org.jfree.data.statistics.Regression class offers some built-in support for regression analysis. 来源： https://stackoverflow.com/questions/10086306/points-on-a

i am using Jfreechart to write a projet of analysing log file, i have a problem of overvide generateToolTip ,what i want to do is when the user move his mouse to a point of a bar, then the "tip" will be show the information of this block(a subtask), i need to show the discription of each subTask. i put my exemple here, i just can show the description of the last subtask . please give me some help if you can. thanks Jiang public class Test { class MyToolTipGenerator extends IntervalCategoryToolTipGenerator { DateFormat format; private MyToolTipGenerator(String value, DateFormat format) { super

I am trying to plot a bar chart using timeseries by introducing the beginning and the end date , but i got a problem with the end date it indicate : Exception in thread "main" org.jfree.data.general.SeriesException : You are attempting to add an observation for the time period 4-mai-2011 but the series already contains an observation for that time period. Duplicates are not permitted. Try using the addOrUpdate() method. final TimeSeries series2 = new TimeSeries("ip max", Day.class); String datebegin = "04/29/2011 02:00:01"; String dateend = "05/04/2011 02:00:01"; DateFormat formatter; Date

由于JFreeChart组件的版本、操作平台、JDK 的设置等因素，在使用 JFreeChart 组件时可能会出现中文乱码的现象。遇到此问题时，可通过设置文字的字体来解决问题。在此提供以下两种解决此问题的方法。 一、设置主题的样式（强烈推荐） 在创建统计图表之前，创建主题样式并指定样式中的字体，通过 ChartFactory 类的 setChartTheme() 方法设置主题样式，这种方式在目前已知的所有版本的 JFreeChart 中均可使用，效果相当不错，我找了好久才找到，而且我觉得这应该是解决中文字体显示为方块的比较标准的方法之壹。 //创建主题样式 StandardChartTheme standardChartTheme = new StandardChartTheme("CN"); //设置标题字体 standardChartTheme.setExtraLargeFont(new Font("隶书", Font.BOLD, 20)); //设置图例的字体 standardChartTheme.setRegularFont(new Font("宋书", Font.PLAIN, 15)); //设置轴向的字体 standardChartTheme.setLargeFont(new Font("宋书", Font.PLAIN, 15)); //应用主题样式

I've got the following problem. I want to zoom-in a Scatterplot and then select all the displayed elements. It would be sufficient to somehow get the displayed area in the zoomed-in Scatterplot. From the range of this area i could determine which elements are displayed in the area and which are not. \edit: Found the Solution (Implementing AxisChangeListener Interface) import java.awt.Color; import java.awt.Dimension; import org.jfree.chart.ChartPanel; import org.jfree.chart.event.AxisChangeEvent; import org.jfree.chart.event.AxisChangeListener; import org.jfree.chart.plot.PlotOrientation;