jcharts-users

[jCharts-users] Hi

[Mike E. <mi...@mi...>]

Is this list still active?
I need a charting package for a current project and am looking
at both JFreeCharts and JCharts for this task. I would like
to discuss/ask if either of these packages support my needs.

Mike

[jCharts-users] Hi

[chinni b. <chi...@ya...>]

Hi All
   
  I got a small problem in jCharts...please help meeeeeee...
   
  i am using this for plotting Percentage of Success vs Date of some job
   
  here y axis is Percentage of Success which can not be more than 100%
   
  even if no data exceeding 100% my y-axis in the generated chart is showing 
   
  scale beyond 100 ....here i am pasting the graph
   
   
   
  
   
   
   
  u can see in above graph that my y-axix is exceeding 100...i even tried to  change the ChartScale.java file for ymax for hard coding it as 100...but that didnot work....may be i have to change some other file also....
   
   
  GUYS PLEASE HELP....I WOULD REALLY APPRECIATE YOUR SUGGESTIONS...
   
   
  Looking Forward for ur reply...


REGARDS
CHINNI.
		
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[jCharts-users] Hi

[Akhalya S. <s_...@ya...>]

I'm new to this.Can anyone tell me where i can get source code for plott graph.
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Re: [jCharts-users] Hi

[Nathaniel G. A. <nat...@ya...>]

Sure, it is still active. A few months back we moved from using the Forums on Sourceforge to
strictly this list which is why the archive for this list is small.

Do you have any specific questions?




--- Mike Eggleston <mi...@mi...> wrote:
> Is this list still active?
> I need a charting package for a current project and am looking
> at both JFreeCharts and JCharts for this task. I would like
> to discuss/ask if either of these packages support my needs.
> 
> Mike
> 
> 
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Re: [jCharts-users] Hi

[Mike E. <mi...@mi...>]

On Mon, 16 Jun 2003, Nathaniel G. Auvil wrote:

> 
> Sure, it is still active. A few months back we moved from using the Forums on Sourceforge to
> strictly this list which is why the archive for this list is small.
> 
> Do you have any specific questions?
> 
> 
> 
> 
> --- Mike Eggleston <mi...@mi...> wrote:
> > Is this list still active?
> > I need a charting package for a current project and am looking
> > at both JFreeCharts and JCharts for this task. I would like
> > to discuss/ask if either of these packages support my needs.
> > 
> > Mike

Yes, several, thanks.

My current project I need to embed six charts into an app (not applet)
window. Each chart will have sub-plots of data. The number of plots
can range from nine plots (data series) to maybe 100 plots. The plots
are mostly lines, though in each chart window/panel there is one plot
of stock-style high/low/open/close bars. The plots all receive data
in real-time, though the way this works is the data comes in and each
plot's data series is updated with the new value. As is typical in
stock applications once the bar's time period has expired, the bars
is moved to the left (older) and a new bar plot is started. So each
plot will receive an update data value, then I need to somehow trigger
the data series to shift to the left (older) and start a new data plot.

My questions are many, though these are some:

- can jcharts work as I have described the app window
  - six charts in the primary app window
- can jcharts plot stock bars
  - I know it can do lines
- can jcharts handle the real-time update
  - if I need to manage the shifting of data to the left (older) that's fine
- can jcharts work with an application (not applet)
  - I deliver all jar files using JNLP
- one odd thing I want to do is to eventially sync all charts to a single scroll
  bar at the bottom of the window
  - so that by moving the one scrollbar all charts are properly scrolled

I think that's a good start. :)

Mike

Re: [jCharts-users] Hi

[Nathaniel G. A. <nat...@ya...>]

> - can jcharts work as I have described the app window
>   - six charts in the primary app window

sure. You can have as many charts as you would like.

> - can jcharts plot stock bars
>   - I know it can do lines
currently, there are only lines for high,low,open,close.  bars representing the open and close
range are not supported.  I will add this as a feature request for the next release.


> - can jcharts handle the real-time update
>   - if I need to manage the shifting of data to the left (older) that's fine
sure.


> - can jcharts work with an application (not applet)
>   - I deliver all jar files using JNLP
yes. There should be no problem running with Java Web Start.


> - one odd thing I want to do is to eventially sync all charts to a single scroll
>   bar at the bottom of the window
>   - so that by moving the one scrollbar all charts are properly scrolled

this is more of how you layout your charts in your application. I believe what you want are a
bunch of JPanel Objects in a single JScrollPane?




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Re: [jCharts-users] Hi

[Mike E. <mi...@mi...>]

On Mon, 16 Jun 2003, Nathaniel G. Auvil wrote:

> 
> > - can jcharts work as I have described the app window
> >   - six charts in the primary app window
> 
> sure. You can have as many charts as you would like.
> 
> > - can jcharts plot stock bars
> >   - I know it can do lines
> currently, there are only lines for high,low,open,close.  bars representing the open and close
> range are not supported.  I will add this as a feature request for the next release.
> 
> 
> > - can jcharts handle the real-time update
> >   - if I need to manage the shifting of data to the left (older) that's fine
> sure.
> 
> 
> > - can jcharts work with an application (not applet)
> >   - I deliver all jar files using JNLP
> yes. There should be no problem running with Java Web Start.
> 
> 
> > - one odd thing I want to do is to eventially sync all charts to a single scroll
> >   bar at the bottom of the window
> >   - so that by moving the one scrollbar all charts are properly scrolled
> 
> this is more of how you layout your charts in your application. I believe what you want are a
> bunch of JPanel Objects in a single JScrollPane?

I'm thinking of the main window like this

+------------------------------+
|              |       |       |
|              |       |       |
|              |       |       |
|              +-------+       |
|              |       |       |
|              |       +-------+
|              |       |       |
|              +-------+       |
|              |       |       |
|              |       |       |
|              |       |       |
+------------------------------+

with a scrollbar at the bottom. Moving the scrollbar, its listener
would know how to adjust the six charts in sync with each other.

So no OHLC stock bars, but each open, high, low, close could be
plotted as individual lines?

How would the real-time updates work?

Mike

Re: [jCharts-users] Hi

[Nathaniel G. A. <nat...@ya...>]

> 
> with a scrollbar at the bottom. Moving the scrollbar, its listener
> would know how to adjust the six charts in sync with each other.
> So no OHLC stock bars, but each open, high, low, close could be
> plotted as individual lines?
> 

did you look at the sample Stock Chart?


> How would the real-time updates work?

I am not sure what you are after.  You add values to your data set and render the chart again. 
There are Interfaces in addition to an Implementation of the data structures, so you could
implement your own data sets if you do not like the ones provided.


Due to the generic nature of this library, very few assumptions can be made about optimizing the
rendering of real time data.  Can you think of any?  Remember the sizing and placement of all the
things on the chart are driven by the data sets, such as vertical axis labels, number of scale
items, etc...  

So, unless you can make assumptions about your data set, such as, all values fall within 0 - 100
and I always want 5 items in the scale starting at zero with an increment of 20, and i am using
horizontal x-axis labels, or my labels never change, etc... then you could say, I will only redraw
the plot area on each data item change as that is the only thing that will change in teh rendered
image.

The source is freely available and you can customize it to render however you like, such as
caching sizing values, and setting clipping regions based on assumptions to your data.

---nathaniel





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