Comments on: Customizing Matlab's Workspace table

By: Yair Altman

Yair Altman — Thu, 29 Nov 2012 22:07:34 +0000

In reply to Fred. @Fred - no need for any Java magic. Simply go to the main Desktop menu-bar, then choose View => Choose Columns

By: Fred

Fred — Thu, 29 Nov 2012 21:22:59 +0000

Hi,
I’m having a weird bug in R2010b running on linux. The right-click is disabled in the table column header of the workspace, so I can only see the columns enabled by default (Name, Value, Min, Max). I really need to see “Bytes” at least! Would you have any idea how to sort this out with your Java magic?
I was thinking: either we need to enable the mouse listener if it’s been disabled for some reason, or access the table model somehow and manually add the column?
It’d be really great if you can help!

By: Yair Altman

Yair Altman — Thu, 22 Mar 2012 21:38:12 +0000

In reply to Lukasz Wiklendt. @Lukasz - try

jWSBrowser = jDesktop.getClientByName('Workspace')

By: Lukasz Wiklendt

Lukasz Wiklendt — Thu, 22 Mar 2012 21:16:18 +0000

In reply to Lukasz Wiklendt. Putting this in startup.m:

jDesktop = com.mathworks.mde.desk.MLDesktop.getInstance;
jDesktop.getClientTitles
jDesktop.getClient('Workspace')

results in this showing up in the command window:

ans =
java.lang.String[]:
    'Command Window'
    'Command History'
    'Current Folder'
    'Workspace'
    'Help'
    'Profiler'
    'File Exchange'
    'Figure Palette'
    'Plot Browser'
    'Property Editor'

ans =
     []

By: Yair Altman

Yair Altman — Wed, 21 Mar 2012 07:28:12 +0000

In reply to Lukasz Wiklendt. @Lukasz - maybe your Workspace client is called something else. run jDesktop.getClientTitles to get the full list of clients in your Matlab - the Workspace should be near the top of this list:

>> jDesktop.getClientTitles
ans =
 
java.lang.String[]:
    'Command Window'
    'Command History'
    'Current Folder'
    'Workspace'
    'Help'
    'Profiler'
    'File Exchange'
    ...

By: Lukasz Wiklendt

Lukasz Wiklendt — Tue, 20 Mar 2012 23:22:53 +0000

In Matlab 2011b the startup script fails since

jWSBrowser = jDesktop.getClient('Workspace');

returns an empty array. The crude workaround that I use to get it to work again is

jWSBrowser = [];
while isempty(jWSBrowser)
    jWSBrowser = jDesktop.getClient('Workspace');
end

By: Tarun Jhamnani

Tarun Jhamnani — Tue, 27 Sep 2011 10:56:07 +0000

In reply to Yair Altman. Looking forward for the article. Will definitely re-post. Thanks Yair.

By: Yair Altman

Yair Altman — Tue, 27 Sep 2011 10:28:13 +0000

In reply to Tarun Jhamnani. There's probably a way somehow to monitor variable allocation and deallocation, but I do not know how to do it. If there is any person in the world (outside MathWorks) who knows, it would probably be Andrew Janke. I plan to post an article of his about Matlab's memory usage sometime in the hazy future, and you could re-post your question there.

By: Tarun Jhamnani

Tarun Jhamnani — Tue, 27 Sep 2011 09:27:40 +0000

In reply to Yair Altman.

Thanks Yair.
I was able to detect the variable deletion. As you have mentioned about CPU load, is there a way where deletion of particular variable can be detected (depending on memory location or something). I want to know more about variable storage in matlab environment so that I can monitor clearing of particular memory location (if it is possible).
The whole point being more efficient technique to monitor variable deletion.

By: Yair Altman

Yair Altman — Tue, 27 Sep 2011 07:58:31 +0000

In reply to Tarun Jhamnani. @Tarun - you can try listening to the TableChanged event on the workspace table's model:

hjModel = handle(jWSTable.getModel, 'CallbackProperties');
set(hjModel, 'TableChangedCallback', @myCallbackFunction);

Just note that this keeps firing all the time so you need to check for actual changes in the rowcount at the very top of your callback and bail-out if no change. Otherwise your Matlab will get stuck in 100% CPU load just processing the callback events...