Serializing/deserializing Matlab data
Matlab does not provide a documented manner to serialize data into a byte stream, but we can do this with some undocumented functionality.
Undocumented function
sprintfc – undocumented helper function
The built-in sprintfc function can be used to quickly generate a cell-array of formatted strings.
Performance: accessing handle properties
Handle object property access (get/set) performance can be significantly improved using dot-notation.
Undocumented Matlab MEX API
Matlab's MEX API contains numerous undocumented functions, that can be extremely useful.
Customizing the standard figure toolbar, menubar
The standard figure toolbar and menubar can easily be modified to include a list of recently-used files.
Pinning annotations to graphs
Annotation object can be programmatically set at, and pinned-to, plot axes data points.
Undocumented Profiler options part 4
Several undocumented features of the Matlab Profiler can make it much more useful - part 4 of series.
Undocumented Profiler options part 3
An undocumented feature of the Matlab Profiler can report call history timeline - part 3 of series.
Setting axes tick labels format
Matlab plot axes ticks can be customized in a way that will automatically update whenever the tick values change.
Profiling Matlab memory usage
mtic and mtoc were a couple of undocumented features that enabled users of past Matlab releases to easily profile memory usage.