Experimental Physics and
Industrial Control System

Michael Davidsaver <[email protected]> · Tue, 21 Feb 2012 18:48:06 -0500

Hello John,

I too have had trouble doing this. I was able to setup a rule to set

the buffer size from the NORD field of a waveform record. The result

was that, when the size was reduced, the start of the waveform was

removed instead of the end. So not very useful.

In the end, as this data was for display only, I "fixed" this by padding

the arrays by repeating the last value. This at least produces the

correct visual effect.

I would welcome a better solution.

Michael

On 2/21/2012 4:45 PM, John Dobbins wrote:

All,

I am trying to create an X-Y graph for displaying a waveform which may change in length.

A Tech-Talk thread from June 2010

http://www.aps.anl.gov/epics/tech-talk/2010/msg00740.php

suggests to put a PV into "Buffer Size" . However I am trying to do that now (CSS 3.1) and find I can only put an integer into this field, not a PV.

Taking a step back, is there a recommended approach for displaying a waveform which may vary in size. I would like the plot x scale to automatically adjust to the new waveform length.

Thanks,

John Dobbins

Cornell University

Experimental Physics and Industrial Control System

Experimental Physics and
Industrial Control System