Realtime charting library

Hi guys,
Can any of you recommend a good graphics library (free or cheap) for realtime time-series charting? I need to plot samples on a scrolling line-chart. I've tried JFreeChart but i'm having problems with flickering and distortion in the charts.

RH-
[url http://forum.java.sun.com/profile.jsp?user=351368] UlrikaJ pointed in this [url http://forum.java.sun.com/thread.jsp?forum=31&thread=546579&message=2662113 ] post
that you could use this library [url http://www.epic.noaa.gov/java/sgt/index.html] Scientific Graphics Toolkit . Download and enjoy!

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Use JFreechart combined with cewolf.
www.object-refinery.com/jfreechart/
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http://cewolf.sourceforge.net/
Both are free.

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When using JRockit JVM with JFreeChart sometimes the JRockit will crash. Apparently this is a bug with JRockit as when we switch to Sun JVM we don't have this problem.
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Best regards
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Hi Yannick
UInfortunately, this is posted in an incorrect SCN Topic Space. Before posting, always check the Overview of the Sapce to see what it covers. E.g.; this Space:
To find the best Space for your query, please see the SCN Site Index
- Ludek
Senior Support Engineer AGS Product Support, Global Support Center Canada
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Chart component Library for JSF.

HI,
I've been testing the chart component library for JSF:
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Regards.

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http://cewolf.sourceforge.net/new/index.html

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hi every one
in my application i have two variables 1)patient id 2) time . that i need to draw in a realtime chart
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// derived from SUN's examples in the javax.comm package
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;
import java.sql.Connection;
import java.sql.DriverManager;
import java.sql.SQLException;
import java.sql.Statement;
import java.util.Enumeration;
import java.util.TooManyListenersException;
import java.lang.*;
import oracle.jdbc.driver.*;
import gnu.io.*; // for rxtxSerial library
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static CommPortIdentifier portId;
static CommPortIdentifier saveportId;
static Enumeration portList;
InputStream inputStream;
SerialPort serialPort;
Thread readThread;
static Connection con = null;
static String messageString = "Hello, world!";
static OutputStream outputStream;
static boolean outputBufferEmptyFlag = false;
public static void main(String[] args)throws SQLException {
boolean portFound = false;
String defaultPort;
// determine the name of the serial port on several operating systems
String osname = System.getProperty("os.name","").toLowerCase();
if ( osname.startsWith("windows") ) {
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defaultPort = "COM5";
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portId = (CommPortIdentifier)CommPortIdentifier.getPortIdentifier(defaultPort);
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try {
serialPort = (SerialPort) portId.open("SimpleReadApp", 2000);
} catch (PortInUseException e) {
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try {
inputStream = serialPort.getInputStream();
} catch (IOException e) {
          System.out.println(e);
try {
serialPort.addEventListener(this);
} catch (TooManyListenersException e) {
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// activate the DATA_AVAILABLE notifier
serialPort.notifyOnDataAvailable(true);
try {
// set port parameters
serialPort.setSerialPortParams(19200, SerialPort.DATABITS_8,
SerialPort.STOPBITS_1,
SerialPort.PARITY_NONE);
} catch (UnsupportedCommOperationException e) {}
}//end constructor
public void serialEvent(SerialPortEvent event) {
switch (event.getEventType()) {
case SerialPortEvent.BI:
case SerialPortEvent.OE:
case SerialPortEvent.FE:
case SerialPortEvent.PE:
case SerialPortEvent.CD:
case SerialPortEvent.CTS:
case SerialPortEvent.DSR:
case SerialPortEvent.RI:
case SerialPortEvent.OUTPUT_BUFFER_EMPTY:
break;
case SerialPortEvent.DATA_AVAILABLE:
// we get here if data has been received
byte[] readBuffer = new byte[400];
try {
// read data
while (inputStream.available() > 0) {
int numBytes = inputStream.read(readBuffer);
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String result = new String(readBuffer);
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} catch (IOException e) {}
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You might consider JFreeChart. There are multiple introductory articles on JFreeChart such as [Visualize Your Oracle Database Data with JFreeChart|http://www.oracle.com/technology/pub/articles/marx-jchart.html] and [On a New Course with JFreeChart|http://www.javaworld.com/javaworld/jw-12-2002/jw-1227-opensourceprofile.html]. The JFreeChart site lists [open source alternatives|http://www.jfree.org/jfreechart/faq.html#FAQ13] to JFreeChart.

Using Flex 3D Charts in Flex Builder 3

Hi all,
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http://www.adobe.com/cfusion/exchange/index.cfm?event=extensionDetail&loc=en_us&extid=1047 990
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How do I get a chart to show the actual time with blocked data??

I am currently working on a program that reads the voltage off of a system with a pulsitile quality. The hardware is not national instruments (I know, not smart, but) so I am taking all info in blocks that cover 3 seconds so I can preform some averaging and frequency checks on it. I want to graph the information over a given period of time but can not get it to go under the proper time. Property Nodes have not worked correctly as I have followed the example in Fund>Charts>Realtime chart. Even with a max of 30 and a min of 0, the chart is ranging 30707 seconds and increasing exponentally. Per Scan I am taking 600 samples and running at 200Hz. Any ideas on how to fix this problem?

> I am currently working on a program that reads the voltage off of a
> system with a pulsitile quality. The hardware is not national
> instruments (I know, not smart, but) so I am taking all info in blocks
> that cover 3 seconds so I can preform some averaging and frequency
> checks on it. I want to graph the information over a given period of
> time but can not get it to go under the proper time. Property Nodes
> have not worked correctly as I have followed the example in
> Fund>Charts>Realtime chart. Even with a max of 30 and a min of 0, the
> chart is ranging 30707 seconds and increasing exponentally. Per Scan
> I am taking 600 samples and running at 200Hz. Any ideas on how to fix
> this problem?
The easiest way to fix this, if you are using LV6, is to us
e waveform
charts. This way you are wiring timestamp and dt to each waveform
chunk. The chart will automatically start showing date and time and
can be customized in the X Scale>>Formatting dialog.
If you are not using LV6 or do not want to use the waveform datatype,
you can open the formatting dialog and set the dt to match the timing
between adjacent points. You can also set the t0 to the initial point
time. The same points can also be set using a property node.
Greg McKaskle

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Hi
Thank you for reading my post.
My problem is about using a Chart library which works well in jsf application but it does not works in JSF portlets.
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to use this charting library we should add a servlet to web.xml
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<servlet>
<servlet-name>Jenia internal servlet</servlet-name>
<servlet-class>org.jenia.faces.util.Servlet</servlet-class>
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Pdf generated through API's does not display pie chart

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bump .... anyone had similar problems ?

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Flex 3.0 Charting

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Are you using Flex Builder 3 Professional? Only the fb3 Pro serial will unlock charting, not Standard.
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Regards
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Realtime charting library

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