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Yair Altman


Consultant

241 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

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Yair Altman's Badges

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

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Contributions in
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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...

21 days ago | 3

Submitted


Draggable data tips
Enable dragging Matlab plot data-tips

1 month ago | 4 downloads |

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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...

1 month ago | 0

Submitted


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

2 months ago | 9 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...

2 months 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 ...

2 months 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 ...

2 months ago | 0

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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...

2 months 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...

2 months 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 ...

2 months ago | 0

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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...

2 months 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...

2 months ago | 0

Submitted


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

2 months ago | 9 downloads |

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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...

3 months ago | 1

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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...

3 months 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...

3 months 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...

4 months 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...

4 months 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...

4 months 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...

4 months 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...

4 months ago | 1

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Submitted


IQML - Matlab connector to IQFeed
Matlab connector to IQFeed optimized for reliability, ease-of-use, functionality and performance (including parallelization)

4 months ago | 0 downloads |

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Submitted


calcGreeks: Calculate option Greeks (European Black/Scholes)
calcGreeks computes fair price and Greek values for vanilla European options using the Black-Scholes-Merton model, optimized for...

4 months ago | 6 downloads |

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Answered
UIComponent JTextField Text alignment
Use JTextField.JavaPeer.CENTER or the value 0 instead of 'CENTER': JTextField.HorizontalAlignment = JTextField.JavaPeer.CENTER;...

4 months ago | 0

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Answered
R2017a - Unsupported major.minor version 52.0
52.0 indicates Java classes compiled with JDK 8 - These classes can only be run under Java 8 or newer. Until R2017a Matlab integ...

4 months ago | 1

Answered
Error when connecting to ib trader workstation
The Trading Toolbox's IB connector is based on ActiveX and is therefore only available on Windows, not Mac or Linux. So if you h...

4 months ago | 0

Answered
New line in legend does not work anymore in MATLAB 2017b
The reason for the problem is that the default legend Interpreter ('lex') does not know how to interpret the '\n' in the label. ...

4 months ago | 0

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.

4 months ago | 6 downloads |

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Answered
How to colorize the document tabs of the editor?
I looked into this problem but I could not find a way to do so. What you proposed is the way that it should have worked, but i...

5 months ago | 1

Answered
Adabting Ui from 2013 to 2016
Unfortunately, The HeightLimits and WidthLimits properties were removed from uiflowcontainer at some point in time. This is quit...

5 months ago | 0

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