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Yair Altman


Last seen: Today

Consultant

287 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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Answered
How to load multiple excel files with multiple excel sheets and store it in matlab faster?
Try to use the 'basic' mode of xlsread, which reads the XLS file directly instead of using the much slower Excel instance: for ...

7 días ago | 0

Answered
Interactive broker timeseries vs history?
Both of these functions in the Trading Toolbox call IB's reqHistoricalDataEx function internally, but for some reason Mathworks ...

18 días ago | 0

Answered
Legend looks very weird
Run the following and check if you still see the same problem: plot(1:3,1:3,'ko-', 1:3,2:4,'ro-', 1:3,3:5,'bo-'); legend('Cere...

20 días ago | 0

Answered
Scrollable text box for GUI with selectable/editable text
Your script generates a GUI that looks perfectly ok to me (fully scrollable & selectable) on my Win10, in both 18b and 20a. Yo...

23 días ago | 1

| accepted

Answered
How can I suppress warnings about javacomponent being deprecated?
Wrap your javacomponent code as follows: oldWarningState = warning('off', 'MATLAB:ui:javacomponent:FunctionToBeRemoved'); [hjc...

25 días ago | 0

| accepted

Answered
Plotting performance reduced in APP
App Designer creates an HTML/JavaScript-based webpages (uifigures), which are noticably slower than the Java-based figures that ...

27 días ago | 0

Answered
Datafeed Toolbox IQFeed Level 1 Data Fields Description
Cross-reference: https://www.mathworks.com/matlabcentral/answers/330794-field-list-of-iqfeed-realtime-data In the Trading Toolb...

28 días ago | 0

Answered
With eSignal/InteractiveData being discontinued in the DataFeed Toolbox, are there any other "mid-range" cost options for financial vendors?
A possible mid-range / low-cost financial datafeed is https://eodhistoricaldata.com, which has a Matlab connector called EODML.

28 días ago | 0

Answered
Creating a time series object from IQFeed data.
Consider using my IQML (IQFeed-Matlab) connector as an alternative. IQML enables both synchronous (blocking) and asynchronous (b...

alrededor de 1 mes ago | 0

Answered
IQFeed: plot return from array of cells?
I believe that the DataFeed toolbox functions only store data in base workspace variables, from which you need to fetch them aft...

alrededor de 1 mes ago | 0

Answered
Is there a way to get the timestamp including milliseconds when using the timeseries function of the datafeed toolbox?
IQFeed only returns the millisecs if you set the connection's IQFeed API protocol to 5.0 (see the IQFeed changelog). In certain ...

alrededor de 1 mes ago | 0

Answered
Can't build Tick data from iQfeed for e-mini S&P Futures(symbol: ES)
Consider using my IQML (IQFeed-Matlab) connector for this. IQML enables both synchronous (blocking) and asynchronous (background...

alrededor de 1 mes ago | 0

Answered
How to effectively utilize listener and callback functions with iqfeed function realtime.
Consider using my IQML (IQFeed-Matlab) connector as an alternative. IQML enables both synchronous (blocking) and asynchronous (b...

alrededor de 1 mes ago | 0

Answered
How do I get tick-by-tick historical data from iqFeed ?
Consider using my IQML (IQFeed-Matlab) connector for this. IQML enables both synchronous (blocking) and asynchronous (background...

alrededor de 1 mes ago | 0

Answered
how to get multiple stocks datafeed for IQFeed?
I believe that the Datafeed Toolbox only allows specifying one symbol at a time. See here for example. As an alternative, consi...

alrededor de 1 mes ago | 0

Answered
Does the Matlab iqfeed link timeseries function provide bid ask data
I believe that IQFeed provides bid/ask data only for historic ticks (HTT,HTX,HTD) queries, but not interval queries (e.g. HIT). ...

alrededor de 1 mes ago | 0

Answered
How to plot data from iqfeed
Consider using my IQML (IQFeed-Matlab) connector for this. IQML enables both synchronous (blocking) and asynchronous (background...

alrededor de 1 mes ago | 0

Answered
IQFeed market depth and time series not working
!NO_DATA! is an IQFeed message that means there is no market-depth data for this symbol. It is my understanding that Market Dept...

alrededor de 1 mes ago | 0

Answered
Listener for receiving real time data through DataFeed Toolbox
Consider using my IQML (IQFeed-Matlab) connector as an alternative. IQML enables both synchronous (blocking) and asynchronous (b...

alrededor de 1 mes ago | 0

Answered
Field List of IQFeed Realtime Data
Cross-reference: https://www.mathworks.com/matlabcentral/answers/459284-datafeed-toolbox-iqfeed-level-1-data-fields-description ...

alrededor de 1 mes ago | 0

Answered
IQFEED and Matlab too slow
For anyone interested, the IQML (IQFeed-Matlab) connector was specifically designed for top performance, including parallel and ...

alrededor de 1 mes ago | 0

Answered
Datafeed toolbox & IqFeed -- any known solution to IAsyncResult error?
Perhaps your IQFeed subscription does not enable fetching historic tick/interval data for XIV. Adding the necessary subscription...

alrededor de 1 mes ago | 0

Answered
Are synchronous IQFEED data queries possible in Datafeed Toolbox 4.5 (R2013a)?
For anyone interested, the IQML (IQFeed-Matlab) connector enables both synchronous (blocking) and asynchronous (background) quer...

alrededor de 1 mes ago | 0

Answered
Can I use the function HISTORY with multiple security inputs for IQFEED data in MATLAB (R2013a)?
For anyone interested, the IQML (IQFeed-Matlab) connector enables querying multiple securities at once, specified as either a ce...

alrededor de 1 mes 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.

alrededor de 1 mes ago | 9 downloads |

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Submitted


cprintf - display formatted colored text in the Command Wind
Displays sprintf-formatted strings in the Command Window using the specified color/underline style

alrededor de 1 mes ago | 101 downloads |

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Answered
3D point clouds with variable marker transparency, color and size
As an alternative to scatter3, you could keep using plot3 and attach a callback function to the axes that gets invoked whenever ...

alrededor de 1 mes ago | 2

Answered
Does 2019b (windows) contains java?
The Java runtime is located in C:\Program Files\Matlab\R2019b\sys\java\jre\win64\jre\bin\

alrededor de 2 meses ago | 0

Submitted


EODML - Matlab connector to EODHistoricalData
Matlab connector to EODHistoricalData optimized for reliability, ease-of-use, functionality and performance (including paralleli...

alrededor de 2 meses ago | 1 download |

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Answered
Figure uitable does not display html image in 2019b
It's not just in tables. For some reason <img> tags are now ignored in all uicontrols (inc. buttons, listboxes etc.). There is n...

alrededor de 2 meses ago | 3

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