Real-time graphs

[snrkiwi-lists]

This is pretty much my plan (or to use an observer pattern). But I was 
wondering if anyone had used any particular graphing package to 
generate these types of graphs? I wouldn't think that driving gnuplot 
in the background would be an efficient approach, for example.

On May 12, 2004, at 1:20 PM, Doug Holton wrote:

> snrkiwi-lists at yahoo.com wrote:
>
>> I've trolled the lists, FAQs, and Net as a whole, but
>> can't find anything definitive to answer this.
>> We're looking for real-time graph capability (bar,
>> line, etc), so that we can display telemetry from a
>> robot system.  There are a bunch of packages out
>> there, but many seem to provide only static graphs
>> (e.g. for scientific, financial data, etc). Does
>> anyone currently display real-time telemetry using
>> Python? Can anyone provide any suggestions?
>
> Unfortunately there is not anything designed specifically for
> real-time graphs in python.  You could create a custom control.
>
> My suggestion is to use a Timer (like wx.Timer in wxpython) set to a 
> particular "frame rate" - how many times the graph should be refreshed 
> per second.  Everytime it fires it updates the graph (if it is a 
> scrolling plot, or else if the data has changed).  Meanwhile in a 
> background thread your time-stamped data points are collected, perhaps 
> into two lists.  If it is a scrolling plot you could discard (or log) 
> data that is old.
> -- 
> http://mail.python.org/mailman/listinfo/python-list
>