Yair Altman

Consultant

Last seen: 2 days ago | Active 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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Submitted

checkClass - inspect a Java/Matlab/Python/COM/C++/.NET class
inspect a Java/MCOS/Python/COM/C++/.NET object or name and display its methods, properties, events, superclasses, subclasses, co...

10 days ago | 10 downloads |

Submitted

export_fig
Publication-quality export of Matlab figures and axes to various vector & bitmap formats

12 days ago | 1497 downloads |

Submitted

AVML - Matlab connector to Alpha-Vantage
Matlab connector to Alpha-Vantage

1 month ago | 0 downloads |

Submitted

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

2 months ago | 2 downloads |

Submitted

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

2 months ago | 118 downloads |

Answered
Matlab class property specification
Starting in 16a, you can use the new syntax as long as you don't specify the dimensions. In other words, the following 2 propery...

3 months ago | 2

| accepted

Submitted

str2number - Fast replacement for str2num and str2double
Fast replacement for str2num and str2double; converts simple scalar input string(s) to number(s)

4 months ago | 6 downloads |

Answered
Any simple ideas to improve performance of reading long (10 GB scale) .csv file?
If you need to read the entire file for some reason, then try to use parallelization with multiple workers. Each worker would re...

4 months ago | 0

Submitted

propertiesGUI - display data in editable context-aware table
propertiesGUI processes and displays a list of data property values in a context-aware GUI table

4 months ago | 7 downloads |

Answered
Operand stack and Execution stack Error using append_pdfs
append_pdfs only accepts PDF input files, not PNG files or any other non-PDF files

4 months ago | 0

Answered
How to add multiple styles to my uiTree?
This looks like an internal Matlab bug. Specifically, after deleting nodes, the uitree's internal StyleConfigurationStorage prop...

5 months ago | 0

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Answered
how to find brushed data
In the new graphics system (R2014b onward), the brushed data info can be extracted from the hidden/undocumented BrushHandles pro...

7 months ago | 1

| accepted

Answered
Exporting images (png) through export_fig - painfully slow
Try to either reduce the resolution (the -r450 part), or to save as a vector-graphics image (PDF/EPS) rather than a PNG bitmap.

8 months ago | 0

Answered
How to save very large image to original resolution
Try to use export_fig's sister image-export utility, ScreenCapture: https://www.mathworks.com/matlabcentral/fileexchange/24323-s...

9 months ago | 0

Submitted

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

9 months ago | 56 downloads |

Submitted

ScreenCapture - screenshot of component, figure or screen
ScreenCapture gets a screen-capture image of any Matlab GUI handle, or specified screen area rectangle

10 months ago | 57 downloads |

Answered
Can I somehow improve performance of str2double?
I use the following function to convert a cell-array of strings to a cell-array of numeric values (where applicable) - it is ~2-...

1 year ago | 3

Answered
Speed issues with Matlab code compiled using SDK compiler for Python
Perhaps your deployed environment is different from your Matlab &D one. For example, perhaps you can access a GPU on the R&D env...

1 year ago | 0

Answered
How To Clear Java Heap Space Memory????
Clearing Matlab's Java heap space has been long awaited, but I'm afraid that the suggested submission (Davide Tabarelli's JavaHe...

1 year ago | 2

Answered
Import data tool speed
The import tool GUI only shows you a preview of the data, based on the top N lines in the file, it does not read and process the...

1 year ago | 0

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Submitted

setFigDockGroup
Sets a figure's docking group container

1 year ago | 5 downloads |

Answered
MATLAB Profiler - Granularity of Information
Use the [undocumented] -detail builtin profiler option, as in: profile on -detail builtin This works on old Matlab releases as ...

1 year ago | 1

| accepted

Answered
How can I make the plot transparent in a gscattter?
Nice answer Adam, but not exactly accurate if you are willing to use some undocumented features... The underlying objects in a...

1 year ago | 3

Answered
MATLAB export_fig crops title
This is fixed in the latest version of export_fig (3.09). In the future, report such issues in export_fig's issues page: https:/...

2 years ago | 0

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Answered
How to speed up a code from the Code Profiler Results ?
Try to set the "Vectorized" property using the odeset function, before running ode45. Also, specifying the Jacobian in advance (...

2 years ago | 0

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Answered
[Soft question] Tips and tools to analyze unfamiliar OO code
For inspecting a single object or class, try the GUI-based uiinspect utility (https://www.mathworks.com/matlabcentral/fileexch...

2 years ago | 0

Answered
Heatmap Axis Labels Printing Vertically?
The heatmap's X labels orientation is dynamically determined based on the number of labels and the axes width. In other words, i...

2 years ago | 1

Submitted

popupPanel Displays a popup panel with specified content
popupPanel Displays a popup panel with specified file contents, help topic, HTML or webpage

2 years ago | 3 downloads |

Answered
graphics performance 2019a vs 2016b
R2019a uses the integrated axes toolbar, which constantly monitors mouse movements in order to generate data tips on-the-fly. If...

2 years ago | 0

| accepted

Answered
Poor performance of mex file
You m-function uses parallelization (parfor), while your mex file does not. This in itself could cause your m-code to run much f...

2 years ago | 0