[kepler-dev] Running Matlab in Kepler

Daniel Crawl crawl at sdsc.edu
Tue Mar 18 16:34:40 PDT 2008

Hi Christopher,

I am updating the Kepler build scripts for the Ptolemy matlab actor.
Could you change ptolemy.matlab.Engine to load the JNI library as
'ptmatlab' instead of 'ptolemy/matlab/ptmatlab'? The latter prevents
the library from being loaded unless it is in a directory structure
that has the form .../ptolemy/matlab/.



Christopher Brooks wrote:
> However, the Ptolemy matlab demo did not run  within Kepler:
> ptolemy.kernel.util.IllegalActionException: There was a problem invoking 
> the Ptolemy II Matlab interface.
> The interface has been tested under Windows and Linux,
> requires that Matlab be installed on the local machine.Refer to 
> $PTII/ptolemy/matlab/makefile for moreinformation.
>    in .MatlabExpression.MatlabExpression
> Because:
> Did not find 'ptolemy/matlab/ptmatlab' in path, searched user.home 
> (c:\cxh\src\kepler) user.dir (C:\Documents and Settings\cxh) and the 
> classpath for 'ptolemy/matlab/ptmatlab.dll', but that was not found either.
> classpath was: 
> c:\cxh\src\kepler\build\classes;c:\cxh\src\kepler\build\src;c:\cxh\src\kepler;c:\cxh\src\kepler\configs;c:\cxh\src\kepler\lib;c:\cxh\src\kepler\lib\images;c:\cxh\src\kepler\build\kepler-icons.jar;c:\cxh\ptII\lib\diva.jar;c:\cxh\ptII\build\ptolemy-doc.jar;c:\cxh\ptII\build\classes;c:\cxh\ptII\build\src 
> Also tried loadLibrary("ptmatlab", exception for loadLibrary was: 
> java.lang.UnsatisfiedLinkError: no ptmatlab in java.library.path
> 	at ptolemy.matlab.Expression.preinitialize(Expression.java:202)
> 	at ptolemy.actor.Director.preinitialize(Director.java:865)
> So, the next step would be to get the Ptolemy Matlab Expression actor
> to work in Kepler or to try the same experiment in Ptolemy.
> I can't try it right now because my Matlab license has expired.
> _Christopher
> myerramothu at miners.utep.edu wrote:
>> Hello Everyone,
>> Thank you Dr. Ludaescher for your reply. The problem that I posted in 
>> Kepler users mailing list was my first question and I think the problem 
>> was because I was running Matlab in Kepler using windows operating 
>> system. I was able to run the Matlab in Kepler without any error using 
>> Linux operating system.
>> My current problem is: I observed a significant slow down in the 
>> execution of my Matlab functions when they are executed in Kepler. 
>> The Matlab actor I am using is /Matlabexpression/. I am sending you 
>> a workflow that calculates the kurtosis and skewness of a Gaussian 
>> random sequence as an attachment to this email. The workflow that I am 
>> sending was developed and executed by me in Linux operating system and 
>> time taken to execute this workflow was approximately 2mins and 10secs. 
>> However, the Matlab instructions used in this workflow can be executed 
>> approximately in 1-2secs when typed directly in Matlab command line.
>> Your help will be very valuable for me to further use the Kepler.
>> Please check the attachment to this email.
>> Thank you very much for your time,
>> Sincerely,
>> Madhu.
>>     ------------------------------------------------------------------------
>>     CC: myerramothu at miners.utep.edu; daks-dev at googlegroups.com;
>>     crawl at sdsc.edu; cxh at eecs.berkeley.edu; jones at nceas.ucsb.edu
>>     From: altintas at sdsc.edu
>>     Subject: Re: Running Matlab in Kepler
>>     Date: Sun, 2 Mar 2008 21:49:12 -0800
>>     To: ludaesch at ucdavis.edu
>>     Hi Madhu,
>>     Which Matlab actor are you using?  I couldn't find your post to
>>     kepler-dev. Could you please forward that one as well?
>>     Thanks,
>>     -ilkay
>>     On Mar 1, 2008, at 2:56 PM, Bertram Ludaescher wrote:
>>         Hi Madhu:
>>         I haven't used the Matlab actor directly, so not sure whether
>>         the problem you describe is a known issue.
>>         I'm cc-ing some people who might know.
>>         All (Ptolemy/Kepler people developers):
>>         Have you witnessed the problem Madhu described?
>>         I think we use the same Matlab actor in Kepler that is used in
>>         Ptolemy, yes?
>>         Madhu:
>>         You might also send a workflow snippet (e.g. MOML) that shows
>>         the problem to kepler-dev.
>>         best
>>         BL
>>         On Thu, Feb 28, 2008 at 5:20 PM, <myerramothu at miners.utep.edu
>>         <mailto:myerramothu at miners.utep.edu>> wrote:
>>             Hello Dr. Ludaescher,
>>             Sorry to contact you directly.
>>             I sent an e-mail to the the Kepler mailing list
>>             about using Kepler with Matlab but I didn't get any reply.
>>             I'm having the following problem:
>>             t here is a significant slow down in the execution of my Matlab
>>             functions when they are executed inside Kepler.
>>             I would like to know if this is a characteristic of Kepler with
>>             Matlab or if it could be a problem specific to my
>>             implementation.
>>             Thank you for your attention,
>>             Sincerely,
>>             Madhu.
>>             Madhu Kishore Yerramothu
>>             Graduate Teaching Assistant,
>>             Department of Electrical and Computer Engineering,
>>             University of Texas at El Paso
>>             El Paso, TX 79968.
>>             Phone: 915 217 4778
>>             Email: myerramothu at miners.utep.edu
>>             <mailto:myerramothu at miners.utep.edu>
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