Comments for Undocumented Matlab

Comment on Solving a MATLAB bug by subclassing by Yair Altman

Yair Altman — Fri, 03 Feb 2012 11:51:43 +0000

@sumaia - validateattributes simply ensures that the specified input variable is of the expected type. You can make these checks yourself, without really needing to use validateattributes. Or, if you are confident that the variables are of the expected type, you can skip these checks altogether.

Comment on Solving a MATLAB bug by subclassing by sumaia

sumaia — Fri, 03 Feb 2012 11:27:43 +0000

I am trying to run an example that uses validateattributes. My matlab is an older version and doesn’t recognise this function. Is it possible to load this function to my matlab and if so can you tell me how. I also need the function list.
Many thanks

Comment on Enable/disable entire figure window by Ramon Fincken

Ramon Fincken — Thu, 02 Feb 2012 15:03:42 +0000

I was using a figure as webfigure (Java JA builder), and I wanted to get rid of the popup window ( the figure window ), while this happens at server GUI.

This is how to suppress the window being created:

f = figure('Visible','off');
// Do stuff here
webFigureHandle = webfigure(f);
close(f);

ps: your WP installation is outdated

Comment on Customizing uicontrol border by Lemikainen

Lemikainen — Thu, 02 Feb 2012 09:35:44 +0000

thx for quick reply, already tried method you suggest yesterday but had some troubles and noticeable delay before changes are applied. Especially if i try to change border and background at the same time, it only changes one property and i have to rerun it to change all… (changing foreground and background at the same time works)

Do you have any idea how to minimalize the delay before applying changes?
here is the code i use
**************************************************************
lineColor = java.awt.Color(1,1,1);
thickness = 1;
roundedCorners = false;
newBorder = javax.swing.border.LineBorder(lineColor,thickness,roundedCorners);

backgroundColor=java.awt.Color(0.141,0.518,1);
foregroundColor=java.awt.Color(1,1,1);
jButton = findjobj(‘class’,'pushbutton’);
length(jButton)

for i=1:1:length(jButton)
set(jButton(i), ‘Background’, backgroundColor,…
‘Foreground’, foregroundColor, ‘Border’, newBorder);
end

Comment on Controlling callback re-entrancy by Michele

Michele — Thu, 02 Feb 2012 08:49:34 +0000

@Yair – Thank you very much for the quick reply, I’ll definitely give it a try.

Comment on Controlling callback re-entrancy by Yair Altman

Yair Altman — Thu, 02 Feb 2012 08:42:16 +0000

@Michele – you could store a temporary flag in a persistent variable or the handle’s ApplicationData/UserData, or a variant of these. For example:

% Variant1
function myCallbackFcn1(hObject,eventData,varargin)
   persistent inCallback
   if ~isempty(inCallback),  return;  end
   inCallback = true;
   try
       % do something useful here
   catch
       % error trapping here
   end
   inCallback = [];
end  % myCallbackFcn1
 
% Variant2
function myCallbackFcn2(hObject,eventData,varargin)
   inCallback = getappdata(hObject,'inCallback');
   if ~isempty(inCallback),  return;  end
   setappdata(hObject,'inCallback',true);
   try
       % do something useful here
   catch
       % error trapping here
   end
   setappdata(hObject,'inCallback',[]);
end  % myCallbackFcn2

Comment on Controlling callback re-entrancy by Michele

Michele — Thu, 02 Feb 2012 08:31:22 +0000

This utility is very interesting, but due to the use of ‘dbstack’ it wouldn’t work in compiled applications.
Do you know of any easy workaround for that?
Thank you very much

Comment on Undocumented XML functionality by Yair Altman

Yair Altman — Thu, 02 Feb 2012 00:47:54 +0000

@James – I don’t have an immediate answer for you, it requires some investigation. This sounds like a good idea for a future article. If you cannot wait for this article to appear, you could contact me by email (link at the top right of this page) to discuss a short consulting gig.

Comment on Recovering previous editor state by MLintFailureFiles or: Why can’t I save my m-file?! | Undocumented Matlab

MLintFailureFiles or: Why can’t I save my m-file?! | Undocumented Matlab — Thu, 02 Feb 2012 00:15:27 +0000

[...] a few weeks ago, when I explained how to use the stored editor state file that is stored in the prefdir folder [...]

Comment on Tab panels – uitab and relatives by Yair Altman

Yair Altman — Wed, 01 Feb 2012 21:54:55 +0000

@Ryan - as I explained in the follow-up article, Matlab tabs have an internal bug that causes Java and ActiveX controls to remain visible when the tabs are changed, unlike "regular" Matlab uicontrols that behave nicely. Several workarounds are mentioned here, and you can also easily fix this bug by modifying the m-files in the folders %matlabroot%/toolbox/matlab/@uitools/@uitabgroup and /@uitools/@uitab. At least some of these problems are fixed as of R2010a, but I can't remember right now whether the Java bug is one of them.