Xihui,
N = 100 and I set Buffer Size to 1000.
The first ten times the waveform record processes the behavior is as
desired. On the 11th update the first 100 samples disappear from the
plot and are not replaced. On the 12th update the second hundred samples
disappear ... until I am left with a blank plot.
CSS 3.1.0.20120201 on win32.
John
On 7/26/2012 1:06 PM, Chen, Xihui wrote:
Hi John,
In BOY XY Graph widget, you just need to set trace property "Buffer Size" to m*N and "Concatenate Data" to yes. Please let me know if it works for you.
Best regards,
Xihui
-----Original Message-----
From: John Dobbins [mailto:[email protected]]
Sent: Thursday, July 26, 2012 12:14 PM
To: EPICS Tech-Talk
Subject: waveform display
All,
I have a waveform record which holds the latest N samples of a
transient. It is periodically updated. I would like to display the last
m readings of this waveform as a single plot, i.e. m*N points, to
recreate a longer time record. With each update the display would
discard the oldest N values and add the newest N values.
I stumbled around in EDM and CSS/BOY and failed to get the behavior I
wanted but may well have missed something. I could accomplish this in
the IOC (creating a long waveform and displaying that) but then I would
be retransmitting data unnecessarily, so I was wondering if this is
easily done in a display tool.
In CSS I could write a javascript which creates a local PV that
implements this behavior?
Other suggestions?
Thanks and regards,
John Dobbins
Cornell Laboratory for Accelerator-based Sciences and Education Cornell
University Ithaca, NY
- References:
- waveform display John Dobbins
- RE: waveform display Chen, Xihui
- Navigate by Date:
- Prev:
RE: waveform display Chen, Xihui
- Next:
Re: waveform display John Dobbins
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
<2012>
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
- Navigate by Thread:
- Prev:
RE: waveform display Chen, Xihui
- Next:
Re: waveform display John Dobbins
- Index:
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
<2012>
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
|