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Re: fast plotting of streaming data - best approach?

From: Martin Helm
Subject: Re: fast plotting of streaming data - best approach?
Date: Sat, 25 Jun 2011 15:25:17 +0200
User-agent: KMail/1.13.7 (Linux/; KDE/4.6.4; x86_64; ; )

Am Samstag, 25. Juni 2011, 14:00:07 schrieb Alexander Poddey:

> Hi all,


> I have some data which comes streaming in (at e.g. 1000 samples /s).

> I hold the old data (at least a part of it) and want to plot lets say the

> last 5000 data points, updated every 1/10 s.


> Calling plot takes a few seconds to bring up the plot (debian squeeze,

> octave 3.2.4, gnuplot 4.4) - the naive approach to re-call plot with the

> new data is too slow.


> Which would be the best strategy to do this?


> Thanks

> Alex

You can try if the fltk backend works faster for you. With version 3.2.4 the command to enable it was

backend fltk

just add it at the very beginning of your script and check if that makes a difference for you.

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