Experimental Physics and
Industrial Control System

Try this instead:

loc://x(0)

which will default it to zero.

Cheers,
Matt


> On Aug 10, 2016, at 3:51 AM, Abdalla Ahmad <[email protected]> wrote:
> 
> How to use these variables loc://x and loc://y ? I added them as input PVs to the script but it gives me loc://x has a null value. Am I missing something?
>  
> Best Regards,
>  
> Abdalla Ahmad
> Control Engineer
> SESAME
> Allan, Jordan.
> Tel: (+962-5) 3511348 , ext. 265
> Fax: (+962-5) 3511423
> Mob: (+962-7)88183296
> www.sesame.org.jo
>  
>  
>  
> From: [email protected] [mailto:[email protected]] On Behalf Of M?rcio Paduan Donadio
> Sent: Monday, August 08, 2016 3:38 PM
> To: [email protected]
> Cc: Márcio Paduan Donadio <[email protected]>
> Subject: Re: Drawing on XY graph widget without the use of a PV in CSS
>  
> 
>     You can use loc variables in X PV and Y PV parameters. Eg: loc://x and loc://y.
> 
>     Inside the script you can do something like this:
> 
> from java.util import Arrays
> from jarray import zeros
> from java.lang import Double
> 
> x = zeros(NUM_OF_STEPS, Double)
> y = zeros(NUM_OF_STEPS, Double)
> 
> for i in range (NUM_OF_STEPS):
>     x[i] = 0
>     y[i] = 0
> 
> # Do processing....
> 
> pvs[0].setValue(x)
> pvs[1].setValue(y)
> 
> 
> -- 
> Márcio Paduan Donadio
> Engenheiro de Computação - Software de Operação das Linhas de Luz
> Laboratório Nacional de Luz Síncrotron – (LNLS)
> Centro Nacional de Pesquisa em Energia e Materiais (CNPEM)
> + 55 (19) 3512-3520 - [email protected]
> www.lnls.cnpem.br
>  
>  
> ------------------------------------------------------------------
> Hello
>  
> Is it possible to draw some data on an XY graph widget from a script/rule without using a PV? I mainly tried setting the property 'pv_value' but nothing appears on the graph. I'm not sure if this is even possible or not. The thing is I will receive a waveform PV value and I want to do some processing on it then displaying the output on the XY graph.
>  
> Best Regards,
>  
> Abdalla. 
>  

Replies:

Re: Drawing on XY graph widget without the use of a PV in CSS Kasemir, Kay

References:

Re: Drawing on XY graph widget without the use of a PV in CSS Márcio Paduan Donadio

RE: Drawing on XY graph widget without the use of a PV in CSS Abdalla Ahmad

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