Comments on: Customizing Matlab’s Workspace table

By: Yair Altman

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

@Lukasz – try

jWSBrowser = jDesktop.getClientByName('Workspace')

By: Lukasz Wiklendt

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

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

@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

Looking forward for the article. Will definitely re-post.
Thanks Yair.

By: Yair Altman

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

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

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

@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…

By: Tarun Jhamnani

Tarun Jhamnani — Tue, 27 Sep 2011 05:55:19 +0000

Hi,
Works like a charm,really awesome.
My question is slightly off the track to this article.Since,it is related to workspace i will go ahead and ask. I will be glad to have input on this.
Can i monitor deletion of any variable from the workspace table(event which gets fired on deletion of variable).I tried listening events related to jworkspace table but it seems they are of no use to detect the deletion of variable.Mouseclicked,property change,key pressed etc all these event i was able to listen to.Am i missing something or i need to change my approach.
Please Help.

By: Customizing Workspace context-menu | Undocumented Matlab

Customizing Workspace context-menu | Undocumented Matlab — Wed, 03 Nov 2010 18:01:59 +0000

[...] Last week, a reader of that article posted a comment asking how to customize the context (right-click) menu with some user-defined actions [...]