Community Profile

photo

Yair Altman


Consultant

247 total contributions since 2007

Website: http://UndocumentedMatlab.com
LinkedIn: http://www.linkedin.com/in/yairaltman

Author of "Accelerating MATLAB Performance" book:
http://UndocumentedMatlab.com/books/matlab-performance

Author of "Undocumented Secrets of MATLAB-Java Programming" book:
http://UndocumentedMatlab.com/books/matlab-java

MSc Computer Science, BSc Physics (both with top honors)

Professional programmer and manager since 1991

Contact me: altmany at gmail.com

Contact

Yair Altman's Badges

  • 6 Month Streak
  • Revival Level 3
  • Knowledgeable Level 3
  • Thankful Level 1
  • First Answer

View details...

Contributions in
View by

Answered
The following appears in the command window. What does it mean?java.lang.NullPointerException
This is an error that originates from Java code, typically concerning some GUI component that misbehavs or which does not handle...

13 Tage ago | 0

Answered
Matlab uitable column font size using html not working
HTML is only supported out-of-the-box in the legacy (Java-based) figures, not the new web-based (AppDesigner) uifigures. You ma...

13 Tage ago | 0

| accepted

Answered
Why does "Auto Width" feature not adapt to table axes size in GUIDE?
The "AutoWidth" setting of the uitable only sets the individual column's width based on its contents. It does not control the en...

16 Tage ago | 1

Answered
How to add a sortable property to uitable within a classic figure.
My Java-based uitable utility on the Matlab File Exchange provides a sortable wrapper for the legacy uitable. The sorting functi...

16 Tage ago | 3

| accepted

Submitted


findjobj - find java handles of Matlab graphic objects
Find java objects contained within a specified java container or Matlab GUI handle

18 Tage ago | 129 downloads |

Thumbnail

Answered
How to open SLDD parameter editor dialog programatically?
try using the openvar function

29 Tage ago | 0

Answered
Why does fplot think my function is not vectorized
As far as I can tell (never mind exactly how), internally a check is made whether the output of fun(1:3) is exactly equaln to th...

29 Tage ago | 1

Submitted


checkClass - inspect a Java/Matlab/COM class object/name
inspect a Java/MCOS/COM/.NET object or classname and display its methods, properties, events, interfaces, etc.

etwa ein Monat ago | 3 downloads |

Thumbnail

Submitted


blurFigure - blurs and prevents interaction on figure window
blurs a specified figure window and prevents interaction with it until the figure is un-blurred

3 Monate ago | 3 downloads |

Thumbnail

Answered
uigetfile with default filter
Adam Danz had the right idea, but missed a few key things. The FilterIndex field should indeed have influenced the filter select...

4 Monate ago | 3

Submitted


Draggable data tips
Enable dragging Matlab plot data-tips

4 Monate ago | 4 downloads |

Thumbnail

Answered
Unable to connect to Interactive Brokers after installed 2018a in new Laptop
Sometime in recent years, presumably around TWS API 9.70, IB changed their COM server's ProgID from 'TWS.TwsCtrl.1' to 'TWS.TwsC...

4 Monate ago | 0

Submitted


getjframe - Retrieves a figure's underlying Java frame
Enable multiple window callbacks and properties not exposed by Matlab

5 Monate ago | 10 downloads |

Answered
How can I speed up my program ?
The first step you should do is to run your code in the Matlab Profiler. This will give you insight as to the specific bottlenec...

5 Monate ago | 0

Answered
Slider Code problem with axes
In your example, both val and x are not scalars. When you multiply vectors/matrices in Matlab using the * operator, Matlab uses ...

5 Monate ago | 0

Answered
I would like to add a 'display-all' hyperlink functionality to a class.
It is true that desktop hyperlinks only work at the base workspace level, but you can still access specific object instances if ...

5 Monate ago | 0

| accepted

Answered
Upside down display of graph
Try to do the following, step-by-step, until you find one of them solves the problem: set(gcf,'renderer','opengl'); opengl('so...

5 Monate ago | 0

Answered
How could i displace the values of X axis under X axis (Y negative) ?
A peculiarity of AxisLocation='origin' is that the X and Y tick labels automatically switch location (from below the X axis to a...

5 Monate ago | 1

Answered
Environment variables in javaclasspath.txt
I do not believe that you can use env vars in your javaclasspath.txt file, but as workaround, you can programmatically load the ...

5 Monate ago | 0

| accepted

Answered
Why Don't Set Breakpoints Work in R2018b?
This could happen if your script runs inside a parallel loop (spmd or parfor), or is shaddowed by a binary version (e.g., file.m...

5 Monate ago | 0

Answered
Using 2018b javaclasspath.txt doesn't seem to get loaded during batch startup.
I'm not sure why your javaclasspath.txt file doesn't load in batch mode. As workaround, you can programmatically load the necess...

5 Monate ago | 0

Submitted


Realtime trading with Matlab and IB presentation files
Realtime trading demo & presentation, presented at NYC Computational Finance Conference 23 May 2013

5 Monate ago | 8 downloads |

Thumbnail

Answered
How do I programmatically set the size of the the web browser window that is created with the MATLAB web command " web " ?
Note: undocumented/unsupported: [h1,h2,h3] = web('http://news.google.com','-notoolbar','-new'); % open a web page drawnow; pau...

6 Monate ago | 1

| accepted

Answered
What happened to the figure toolbar in R2018b? Why is it an axes toolbar? How can I put the buttons back?
For the benefit of readers who don't follow my blog, Michelle Hirsch posted the following comment yesterday, which sheds some li...

6 Monate ago | 1

Answered
Parfor loop introduces strange R%1 variable when using 2 reduction variables
I was able to reproduce your problem on my R2018a and R2018b Windows10 installation, but not in 19a. Apparently this bug (it is...

7 Monate ago | 1

Answered
Problem with history function. Trading toolbox
Here's how you can fetch IB's historical data using the IB-Matlab connector: >> data = IBMatlab('action','history', 'symbol','I...

7 Monate ago | 0

Answered
Error with " Request Interactive Brokers Historical Data" example
Here's how you can fetch IB's historical data using the IB-Matlab connector: >> data = IBMatlab('action','history', 'symbol','I...

7 Monate ago | 0

Answered
Trading Toolbox - Retrieve Option Chain from Interactive Brokers
Here's how you can fetch the full option chain using the IB-Matlab connector, for example all futures options for the 10-year US...

7 Monate ago | 0

Answered
Problems for Interactive Brokers connection
Trading Toolbox support for Interactive Brokers is limited to Windows only. This is clearly mentioned in the documented system r...

7 Monate ago | 1

Answered
java.io.File - strange behaviour
With most Java methods, you can follow the method invocation parentheses with a dot, thereby chaining methods. For example: myJP...

7 Monate ago | 1

| accepted

Load more