[Rock-dev] using parts of log files

[Alexander Duda]

On 02/23/2012 08:29 PM, Henning Kost wrote:
> Hi,
>
> I'm currently trying to implement an automatic test for a task that uses
> sonar data. I want my test to feed the task with several log files and
> analyze the output of the task. But I don't want to process the whole
> files but only parts of it. So my question is if there is a way to edit
> existing log data i.e. store index i to j in a new log file.
> Alternatively, is there a way to handle my log data in a ruby script to
> start and end at specific indices, which would also do the trick?
> Any suggestions?

You can use rock-convert to extract parts of a log file. It is not meant 
for this but it would do the trick (see rock-convert --help).
An other solution would be to use the API from Orocos::Log::Replay to 
replay only parts of the log file to your components.

replay = Orocos::Log::Replay.open(my_logfile)
#do all the connections here
replay.seek(my_index)
while replay.sample_index != my_index2 && replay.step
     Vizkit.process_events #this is only needed if you are using qt 
widgets somewhere in the script
end

Alex

-- 
Dipl.-Ing. Alexander Duda
Unterwasserrobotik

DFKI Bremen
Robotics Innovation Center
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E-Mail: alexander.duda at dfki.de

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