Recent changes to support-requests

axis labels

javula — Mon, 30 Apr 2007 16:30:52 -0000

Hi all,

i 'm using chart2d library to create my own graphs and i was wondering how can i place the labels of x-axis vertically. i 've read the tutorial, but found nothing about this.

any help would be welcome

Thanx in advance.

Release on Maven2's ibiblio repository

Geoffrey De Smet — Thu, 02 Mar 2006 08:08:54 -0000

http://www.ibiblio.org/maven2 is a huge repository of
open source Java libraries. Many projects have switched
ANT (ant.apache.org) for Maven 2 (maven.apache.org).
Maven2 allows for automatic downloading of the Ibiblio
repository.

You can make upload requests both with an ANT task or
Maven 2 itself (but the later would require you to
configure maven2 for your project).

More motivation here:
http://maven.apache.org/project-faq.html
How to upload here:
http://maven.apache.org/guides/mini/guide-ibiblio-upload.html

PS: Maven 2 is great for building, dependency
management, documentation, continues integration, etc,
consider using it too :)

Is Chart2D feasible for my project?

SteveAngello — Wed, 01 Mar 2006 22:57:24 -0000

I'm currently working on a large final year project.
The aim is to create a Sound Analyzer using Netbeans
and Java to create a GUI that can of firstly
displaying data in graph form loaded from a file, and
later to take an input from a microphone and display
that data. The sound data will be viewable in the
time and frequency domains using Fast Fourier
Transform.

I've looked at the other packages (JFree, MagPlot),
and am trying to decide which would be best suited.
MagPlot, is capable of dynamic charting, which would
be useful but not essential for when it comes to the
coding for the mic.
Problem is, I'm not great a Java and can't really tell
which is the best long term option because I'm moving
pretty slowly with it. I can't actually test MagPlot
because one of the libraries it needs (JSX) is nowhere
to be found....So basically I'd like to know if anyone
experienced in any these packages (or any others)
could tell which would be best.

Any help appreciated

Robin

Number Labels

sirrurg — Fri, 18 Mar 2005 11:11:53 -0000

Hi everyone,

i am new to Chart2D and i have discovered some
"strange" behaviour. Currently i am using LLCharts
cause i am having
very long labels for the Axis.
The first "problem" is, that the bars drawn, sometimes
dont reach the correct value.
For example if have data like this:
{2, 4, 8, 2, 2}
In this case only the values 4 and 8 reach the correct
labels of
the x-Axis and the values of 2 somehow stop between values
1 & 2 of the x-Axis.
But i have no clue why ... do i have to set a secial
value?!?

Second problem is:
Somehow the labels of the number axis, dont behave the
way i thought. For example if i am have a exisitng
chart with already inserted dataset. In the next step i
exchange this dataset, by removing old one and adding
new one with some greater values.
Let say the datasets new max value is 20 and i set
explizitly

graph2DProps.setNumbersAxisNumLabels((int)dataset.getGreatest()+1);

Somehow there are not number labels beginning with 0 to
20 with
step size of 1. Can i set explizitly that the step size
should be one?!? Especially i would like to be able to
choose the step
size explizitly ... this would be very confortable, but
i didnt find
some like setStepSize within Graph2DProperties.

Sincerely
Sirrurg

can i delete this gap???

Wander — Tue, 18 Jan 2005 12:20:37 -0000

hello everyone! Im useing Chart2D not that long... n i
want to ask is there any ways to delete gap between
bars in vertical bars chart? Thanks!

applet notinited

Pathma Rathinavelu — Fri, 20 Aug 2004 17:22:25 -0000

Hello,

Thanks for sharing Chart2D. I am trying to use the
LBChart2DFrameDemo, specifically I use
only 'getChart2DDemoF()'. (Line chart). In this I am
trying to insert new values to dataset and execute it.

for the x-axis and y-axis values i get data from different
files and store them as integer and float arrays
respectively. I pass them as parameters to
dataset(0,count,0) and also to set the dataset values I
use, dataset.set(0,x-axis,0,y-axis).

THe program compiles without any error. However, when
i run the applet, it says "Applet LBChart2DFrameDemo
notinited". I found some solutions for this kind of
problem in the internet, which says one should delete all
old files and try once again, and the applet would load
properly.

But it dosen't. I am not sure what is the error, my code
dosent have any bug or error, when i run it as a
separate program / applet it works fine. But when i add
the values to DATASET it complies OKay, but dosen't
show the applet and i get "Applet LBChart2DFrameDemo
notinited".

I can't make out why this happens!
Any help would be appreciated.

Pathma

Help With Pie Charts

Zeldy Stern — Sun, 08 Feb 2004 14:14:56 -0000

Hello,

Thank you for creating and sharing
your Java Charting Components.
I am trying to use the Pie Charts
and I am getting the following error:

java.lang.ArrayIndexOutOfBoundsException: 1
at
net.sourceforge.chart2d.VerticalTextListArea.paintComponent(Compiled
Code)
at
net.sourceforge.chart2d.LegendArea.paintComponent(Compiled
Code)
at
net.sourceforge.chart2d.ChartArea.paintComponent(Compiled
Code)
at
net.sourceforge.chart2d.PieChartArea.paintComponent(Compiled
Code)
at
net.sourceforge.chart2d.PieChart2D.updateImage(PieChart2D.java:388)
at
net.sourceforge.chart2d.PieChart2D.paintComponent(PieChart2D.java:332)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at javax.swing.JLayeredPane.paint(Compiled
Code)
at
javax.swing.JComponent.paintChildren(Compiled Code)
at javax.swing.JComponent.paint(Compiled Code)
at java.awt.Container.paint(Compiled Code)
at
sun.awt.motif.MComponentPeer.handleEvent(Compiled Code)
at
java.awt.Component.dispatchEventImpl(Compiled Code)
at
java.awt.Container.dispatchEventImpl(Compiled Code)
at java.awt.Window.dispatchEventImpl(Compiled
Code)
at java.awt.Component.dispatchEvent(Compiled
Code)
at java.awt.EventQueue.dispatchEvent(Compiled
Code)
at
java.awt.EventDispatchThread.pumpOneEvent(Compiled
Code)
at
java.awt.EventDispatchThread.pumpEvents(Compiled Code)
at
java.awt.EventDispatchThread.run(EventDispatchThread.java:83)

Would you know off-hand what would cause this
or do you need me to post the code?

Zeldy Stern

ArrayIndexOutOfBoundsException with line graphs

Sebastian Kurfürst — Tue, 23 Dec 2003 13:20:39 -0000

Hello,
I seem to be too stupid to figure that out on my own :-/
Every time I insert these two lines:
graphProps.setGraphBarsExistence(false);
graphProps.setGraphLinesExistence(true);
I get an ArrayIndexOutOfBoundsException ...
My properties:

GraphProperties graphProps = new GraphProperties();
graphProps.setGraphBarsExistence(false);
graphProps.setGraphLinesExistence(true);

My dataset looks like that:
Dataset dataset = new Dataset(1, monat, 4);
for(int i = 1;i<monat;i++) {

dataset.set(0, i, 0, out[i][2]); //the
last value is float
dataset.set(0, i, 1, out[i][3]);//the
last value is float
dataset.set(0, i, 2, out[i][4]); //the
last value is float
dataset.set(0, i, 3, out[i][5]); //the
last value is float
}

Thank you for helping me,
Sebastian

Get error when deployed on different system

Ken Remedios — Sat, 27 Sep 2003 00:45:29 -0000

Hello. I'm using version 1.9.6 (the latest version).

I've created a servlet that uses Chart2D to create a jpg
that outputs to a web page. When running on my local
system (NT 4 using Tomcat 3.2.2) everything works fine.

When I deploy to a remote server running Linux and
Tomcat 3.2.3 and then run my app, I get the following
error:

Internal Servlet Error:

java.lang.NoClassDefFoundError

at java.lang.Class.ForName0(Native Method)
at java.lang.Class.forName(Class.java:140)
java.awt.GraphicsEnvironment.getLocalGraphicsEnvironme
nt(GraphicsEnvironment.java:62)
...

Do you think the remote Tomcat server is missing
requisite classes? Perhaps classes that support
java.awt graphics?

Thanks for your help.

Encode charts to images

shankar — Mon, 24 Feb 2003 11:01:51 -0000

How can I encode the charts into images
like any jpeg/gif...?