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<== Date ==> <== Thread ==>
Subject: Re: Waveforms in Archiver Appliance
From: John Dobbins via Tech-talk <tech-talk at aps.anl.gov>
To: "tech-talk at aps.anl.gov" <tech-talk at aps.anl.gov>, "Shankar, Murali" <mshankar at slac.stanford.edu>
Date: Fri, 22 Apr 2022 14:27:47 +0000
Murali,

Thanks. More investigation revealed the time values I was providing in the request were off by four hours. GMT? 

It does indeed work.

I need to read the docs again, it's been a while.

John

From: Tech-talk <tech-talk-bounces at aps.anl.gov> on behalf of Shankar, Murali via Tech-talk <tech-talk at aps.anl.gov>
Sent: Friday, April 22, 2022 10:25 AM
To: tech-talk at aps.anl.gov <tech-talk at aps.anl.gov>
Subject: Re: Waveforms in Archiver Appliance
 
I tried fetching a waveform with "R2020a (9.8.0.1323502) 64-bit (glnxa64)" and it works for me so I think getting waveforms into Matlab should be supported.


>> dat = load('temp.mat')
>> try
    header = dat.header;
    data = "">
catch
    fprintf('Could not get data from file\n');
    return
end
>>
>> header

header =

  struct with fields:

    source: 'Archiver appliance'
    pvName: '....:VOLT_BUFFER_RBV'
      from: '2022-04-21T13:15:00.000Z'
        to: '2022-04-21T13:15:10.000Z'

>> data

data ="">

  struct with fields:

    epochSeconds: [2x1 int64]
          values: [2x1000 double]
           nanos: [2x1 int64]
           isDST: [2x1 uint8]



Have you tried using curl to check the size of the file you get back to make sure there is data in the time frame you are looking for?


curl -s "https://.../retrieval/data/getData.mat?pv=...:VOLT_BUFFER_RBV&from=2022-04-21T13:15:00.000Z&to=2022-04-21T13:15:10.000Z" | wc
3      41    1194


Regards,
Murali


References:
Re: Waveforms in Archiver Appliance Shankar, Murali via Tech-talk
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