Re: Channel Archiver | Matlab

[John Dobbins <jad@lepp.cornell.edu>]

Eric Berryman wrote:
> Hello!
>
> I'm having some problems with the Matlab part of the Channel Archiver.
>  Everything compiles (mex) fine in the /Matlab directory (make
> matlab), but when any of the matlab commands are executed in matlab
> (example: ml_arch_plot), I receive the following error:
>
> ??? Invalid MEX-file
> '/opt/epics/extensions/src/ChannelArchiver/Matlab/O.linux-x86/ArchiveData.mexglx':
> libdbStaticHost.so: cannot open shared object file: No such file or
> directory.
>
> The file libdbStaticHost.so is in
> /opt/epics/base-3.14.9/lib/linux-x86/ as would be expected.
>
> Has anyone else run into this problem?
>
> Thank you!
> Eric Berryman
>
> Cyclotron Controls Engineer
> National Superconducting Cyclotron Laboratory
> Michigan State University

I also had trouble getting the Matlab mex files to build and work 
however I realized one can use Matlab along with the archiveviewer.jar 
file to access Archiver data (no mex files required). Example Matlab 
session follows (this is localized so you will need to make some changes).

***************************************

>> javaaddpath(fullfile(matlabroot,'work','archiveviewer.jar'))

>> client = epics.archiveviewer.clients.channelarchiver.ArchiverClient();

>> client.connect('http://ees101/archive/cgi/ArchiveDataServer.cgi', []);

>> client.getServerInfoText()

ans =

http://ees101/archive/cgi/ArchiveDataServer.cgi
Server version: 0
----------------------------------------
Description
Channel Archiver Data Server V0,
built Dec  7 2005, 10:04:55
from sources for version 2.6.0
Config: '/mnt/disk1/www/html/archive/serverconfig.xml'
----------------------------------------
Methods
average
linear
plot-binning
spreadsheet
raw


>> x = client.getAvailableArchiveDirectories()

x =

epics.archiveviewer.ArchiveDirectory[]:
    [epics.archiveviewer.clients.channelarchiver.ArchiveInfo]



>> x(1).getName

ans =

Room128

>> y = client.search(x(1), 'gun_hv_volt_rdbk', [])

y =

epics.archiveviewer.AVEntry[]:
    [epics.archiveviewer.clients.channelarchiver.CAEntry]


>> z = client.getAVEInfo(y(1))

z =

epics.archiveviewer.AVEntryInfo@86359


>> start_t = z.getArchivingStartTime()

start_t =

  1.1685e+012

>> end_t = z.getArchivingEndTime()

end_t =

  1.1713e+012

>> r = client.getRetrievalMethod('linear')

r =

linear

>> req_obj = epics.archiveviewer.RequestObject(start_t, end_t, r, 1000)

req_obj =

epics.archiveviewer.RequestObject@80000003

>> data = client.retrieveData(y, req_obj, [])

data =

epics.archiveviewer.ValuesContainer[]:
    [epics.archiveviewer.clients.channelarchiver.NumericValuesContainer]

.

>> data(1).getNumberOfValues()

ans =

   248

>> data(1).getValue(1)

ans =

[0.0]

>> data(1).getValue(2)

ans =

[0.0]

>> data(1).getValue(3)

ans =

[176.269315853876]

>> data(1).getTimestampInMsec(3)

ans =

  1.1685e+012

>>