Matlab includes some numerical gotchas that we should be careful to avoid...
Matlab's standard plot data-tips can be customized to enable dragging, without being limitted to be adjacent to their data-point.
Matlab includes many custom JIDE combo-box controls that can be used in Matlab GUIs out of the box.
Matlab's popup menu (combo-box) control is quite limited in its abilities. This article explains how we can work around these
Undocumented features of Matlab editbox uicontrols enable immediate user-input data validation