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Smart listbox & editbox scrollbars
A good friend recently asked me for examples where using Java in Matlab programs provides a significant benefit that would offset the risk of using undocumented/unsupported functionality, which may...
View ArticleSetting class property types – take 2
Three years ago, almost to the day, I wrote about a very handy undocumented feature of Matlab classes that enables us to specify type restrictions for any Matlab class property. We can specify property...
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Transparent labels
For the application that I will be presenting at next week’s MATLAB Expo in Munich (presentation slides), I wanted to add a text label at a specific location within the figure. The problem was, as you...
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Viewing saved profiling results
Many Matlab users know and utilize Matlab’s built-in Profiler tool to identify performance bottlenecks and code-coverage issues. Unfortunately, not many are aware of the Profiler’s programmatic...
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rmfield performance
Once again I would like to introduce guest blogger Hanan Kavitz of Applied Materials. Several months ago Hanan discussed several quirks with compiled Matlab DLLs. Today Hanan will discuss how they...
View ArticleFigure window customizations
A friend recently asked me, in light of my guesstimate that Java-based Matlab figures will be replaced by web-based figures sometime around 2018-2020, whether there are any “killer features” that make...
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MEX ctrl-c interrupt
I recently became aware of a very nice hack by Wotao Yin (while at Rice in 2010; currently teaching at UCLA). The core problem is that unlike m-files that can be interrupted in mid-run using ctrl-c,...
View ArticleHandling red Java console errors
Anyone who has worked with non-trivial Matlab GUIs knows that from time to time we see various red Java stack-trace errors appear in the Matlab console (Command Window). These errors do not appear...
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A few parfor tips
Matlab Expo 2016 keynote presentation A few days ago, MathWorks uploaded a video recording of my recent keynote presentation at the Matlab Expo 2016 in Munich, Germany. During the presentation, I...
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Listbox selection hacks
Last week a reader on the CSSM newsgroup asked whether it is possible to programmatically deselect all listbox items. By default, Matlab listboxes enable a single item selection: trying to deselect it...
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Customizing uifigures part 1
Last month, I posted an article that summarized a variety of undocumented customizations to Matlab figure windows. As I noted in that post, Matlab figures have used Java JFrames as their underlying...
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Customizing axes part 5 – origin crossover and labels
When HG2 graphics was finally released in R2014b, I posted a series of articles about various undocumented ways by which we can customize Matlab’s new graphic axes: rulers (axles), baseline, box-frame,...
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AppDesigner’s mlapp file format
Six years ago, I exposed the fact that *.fig files are simply MAT files in disguise. This information, in addition to the data format that I explained in that article, can help us to introspect and...
View ArticleZero-testing performance
I would like to introduce guest blogger Ken Johnson, a MATLAB Connections partner specializing in electromagnetic optics simulation. Today Ken will explore some performance subtleties of zero testing...
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Customizing uifigures part 2
I would like to introduce guest blogger Iliya Romm of Israel’s Technion Turbomachinery and Heat Transfer Laboratory. Today Iliya will discuss how Matlab’s new web-based figures can be customized with...
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Aligning uicontrol contents
Matlab automatically aligns the text contents of uicontrols: button labels are centered, listbox contents are left-aligned, and table cells align depending on their contents (left-aligned for strings,...
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Icon images & text in Matlab uicontrols
One of my consulting clients recently asked me if I knew any builtin Matlab GUI control that could display a list of colormap names alongside their respective image icons, in a listbox or popup menu...
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uigetfile/uiputfile customizations
Matlab includes a few built-in file and folder selection dialog windows, namely uigetfile, uiputfile and uigetdir. Unfortunately, these functions are not easily extendable for user-defined...
View ArticleWorking with non-standard DPI displays
With high-density displays becoming increasingly popular, some users set their display’s DPI to a higher-than-standard (i.e., >100%) value, in order to compensate for the increased pixel density to...
View ArticleSpeeding up Matlab-JDBC SQL queries
Many of my consulting projects involve interfacing a Matlab program to an SQL database. In such cases, using MathWorks’ Database Toolbox is a viable solution. Users who don’t have the toolbox can also...
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