jfreechart

JFreeChart Polar chart fill Zero to the point

由 萝らか妹 提交于 2019-11-30 20:50:58
问题 May be I could not phrase t the question right. Let me Explain I want to draw polar chart that starts the value from the zero and fill it to the desired point. When I plot graph it show something like this But I am looking for something like this Here is the sample Code import java.awt.Color; import java.awt.Dimension; import org.jfree.chart.ChartFactory; import org.jfree.chart.ChartPanel; import org.jfree.chart.JFreeChart; import org.jfree.chart.PolarChartPanel; import org.jfree.chart.plot

JfreeChart使用经验总结(分析了使用中碰到的一些常见问题)

由 假装没事ソ 提交于 2019-11-30 18:24:05
jfreechart使用经验总结(针对版本：jfreechart-1.0.0-pre2.zip) 问题一：在每次生成jfreechar图片的时候都会抛出异常，异常指出问题出在ChartFactory.createXYLineChart(picName, "时间轴", "数据", xydataset,true, true, false)这行代码上(或create其他类型的chart) 分析：由于jfreechart用到的画图库是Java AWT，所以需要确保JVM运行在headless模式下。如果在Unix系统中使用jfreechar，需要在tomcat的bin目录下catalina.sh文件中run和start两处添加-Djava.awt.headless=true / 问题二：在Unix系统下生成的jfreechart图片中的中文出现乱码 分析：乱码有两种情况： 一种是中文显示为问号(?)，这种情况一般是由于汉字编码转换出错。需要对Unix系统中当前用户的.cshrc文件中setenv LC_CTYPE iso_8859_1修改为setenv LC_CTYPE zh即可。 一种是中文显示为方框(□)，这种情况一般是由于jfreechart中用到的字体在当前Unix系统中不存在。jfreechart包中所用到的所有字体如下： new Font("SansSerif", 1, 12)

Spark中导入jfree

由 瘦欲@ 提交于 2019-11-30 12:27:12
两种情况： 情况一：这里使用的SBT，电脑可以连上SBT相关服务器 这种情况简单粗暴，直接在build.sbt文件里面加入如下代码 1 // https://mvnrepository.com/artifact/org.jfree/jfreechart 2 libraryDependencies += "org.jfree" % "jfreechart" % "1.0.19" 等build.sbt更新一波，就可以直接导入jfree了 情况二：连不上sbt相关服务器，要下载jfree相关的包 先进入maven的官网，这个链接：https://mvnrepository.com/ 进去之后搜索jfree，然后下载自己需要版本的jar包 除了下载jfree包，还要下载相关的依赖包 对于这些包的使用，这里直接盗图，如下图 完事儿新建一个scala类，就可以导入jfree相关的包了 来源： https://www.cnblogs.com/zhuangbijingdeboke/p/11586031.html

JFreeChart for dynamic xy plots in java swing gui application

由 落爺英雄遲暮 提交于 2019-11-30 10:25:36
Has anyone worked with JFreeChart-open source library for plotting xy plots? Could someone post an example of how to create an xy plot dynamically with the x and y values generated from the program? And where can i get a turorial doc or something of that kind to know about how to use the JFreeChart for developing applications? Thanks in advance.. Have you tried looking at the JFreeChart demos? See here . If you find a sample that suits what you want to do, searching for the name of the demo in Google often pulls up the demo source code from (for example) Koders: PieChartDemo1.java This is a

How can I create a bar-chart with JFreeChart, that shortens too long bars with a visible hint?

由 ☆樱花仙子☆ 提交于 2019-11-30 10:00:50
I want to create a bar-chart, but extraordinary high values should be shortened. An example is this image: (source: epa.gov ) I hope it is clear what I want. My question is: How can I do this with JFreeChart . If it isn't possible with JFreeChart you can possibly recommend alternative open-source Java-libraries to produce such an output. pjp You could do it with a CombinedDomainCategoryPlot or CombinedDomainXYPlot . Set the range axis of the first plot to your cut off value and then do something similar with the second plot. Then add them to a combined plot. import org.jfree.chart.ChartFactory

Update a plot in JFreeChart

由 时间秒杀一切 提交于 2019-11-30 09:47:50
问题 I have a parabola plot, coefficients of parabola equation are stored in array a . In mouseDragged (mousemotionlistener), coefficients of parabola were changed and I want to update a parabola plot with new coefficients in realtime. How can I make this happen? public class ParabolaDemo extends ApplicationFrame { int flag = 0; double px = 0.0, py = 0.0, chartpx = 0.0, chartpy = 0.0, chartX = 0.0, chartY = 0.0; int windowheight = 270; ChartPanel chartPanel; PolynomialFunction2D p; double lrange =

Which JFreeChart is the easiest to use for representing simple line and bar charts [closed]

由 寵の児 提交于 2019-11-30 09:45:57
问题 Closed. This question is off-topic. It is not currently accepting answers. Want to improve this question? Update the question so it's on-topic for Stack Overflow. Closed 5 years ago . The data I am trying to represent in my charts will usually be shown with timestamps (dates and times) going along the bottom, or x axis, and a variety of data (which will always be simple integers or maybe float data in the future) shown on the left axis. Basically it will be mapping events along the bottom,

Update normal distribution graph using JTextField in JFreeChart

由 拈花ヽ惹草 提交于 2019-11-30 09:34:21
问题 I have a class that extends JPanel for JFreeChart . Inside of setMean() , I tried updating values of dataset or just the Function2D , but nothing changes on the graph even with repaint() . public class JFreeChartPanel extends JPanel { Function2D normal = new NormalDistributionFunction2D(0.0, 3.0); XYDataset dataset = DatasetUtilities.sampleFunction2D(normal, -5.0, 5.0, 100, "Normal"); double mean = 0.0, std = 1.0; public double getMean() { return mean; } public void setMean(double mean) {

How to show information of each task in Gantt chart

由 馋奶兔 提交于 2019-11-30 09:33:46
问题 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

JFreeChart doesn't appear when I click on button

由 Deadly 提交于 2019-11-30 09:08:35
问题 I see no output for this code in panel, but in console points (X,Y) come out. I searched more and more and nothing. This is UI class: /* * To change this license header, choose License Headers in Project Properties. * To change this template file, choose Tools | Templates * and open the template in the editor. */ package com.dspTasks.UI; import dsp.ReadFile; import java.awt.BorderLayout; import java.io.FileNotFoundException; import java.util.ArrayList; import java.util.logging.Level; import
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