Experimental Physics and
Industrial Control System

"Kim, Kukhee" <[email protected]> · Fri, 4 Mar 2005 08:57:58 +0900

Hi;

You can use compression record to take statistics. (some of option for N to
1 compression).

Thank you.
------------------------------
Kukhee Kim
Instrument & Control, KSTAR
Korea Basic Science Institute
52 Yeoeun-dong, Yusung-gu, Daejeon 305-333
Korea
Email: [email protected]
Tel: +82 42 870 1616     Fax: +82 42 870 1609      Cell: +82 17 513 4849

-----Original Message-----
From: Ralph Lange [mailto:[email protected]] 
Sent: Friday, March 04, 2005 2:41 AM
To: Emmanuel Mayssat
Cc: EPICS Tech Talk
Subject: Re: Maximum of a waveform record

I remember there was a first attempt (about a year ago) to bundle a 
bunch of existing waveform signal processing records into a soft support 
module and make it available for download. (I remember some records 
doing statistics - similar to what you need - from APS and a digital FFT 
record from LANL.)

Does anyone know how far this attempt got? Does anyone feel responsible 
for it?

Cheers,
Ralph

Emmanuel Mayssat wrote:

> Hello,
>
> I would like to get some statistical information on a waveform ( 
> min/max/average).
> A possible solution to extract this info would be to modify the 
> waveform record. In general I would prefer to stay away from creating 
> new records, so is there a way to get extract statistical info from an 
> existing waveform by using several existiong records type?
>
> Another similar question:
> Our waveform is displayed every 10 seconds (time it takes to fill an 
> array of 1000 samples). Now I would like to get prompt 
> average/max/min, i.e. statistical information on part of the waveform 
> (let's say the 100 first sample, and possibly as soon as those samples 
> are collected (not 10sec later after the waveform update)).
>
> Thanks,

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System