Basics of MATLAB and Beyond

set(h,’string’,{’Red’;’Green’;’Blue’;...’Pale Goldenrod’;’Orange’;’yellow’})The item selected within the listbox is accessed via its “value” property.For example, after selecting a colour from the list you can extract itusing the following commands:>> str = get(h,’string’);>> str(get(h,’value’))ans =’Pale Goldenrod’Popup menuPopup menus are similar to listboxes in that they allow you to choosefrom among a list of alternatives, but only one item is shown at a time;the others become visible only when you press the button. Assumingyour listbox is still present from the previous example, you can convertit to a popup menu by typing the following:set(h,’style’,’popup’,...’pos’,[168 219 145 32])We changed the size (position) at the same time to make it look more likea standard button. The user’s choice is accessed by the popup menu’s“value” property, as for listboxes.34.3 Exclusive Radio ButtonsRadio buttons can be used to offer a choice of one, and only one, itemfrom among alternatives. Think of a car radio with buttons for thedifferent radio channels: when you press one button in, the correspondingchannel only is selected. matlab’s radio buttons do not automaticallybehave this way. You may want to allow more than one radio button tobe pressed at a time. But if you do want exclusive radio buttons youmust implement them with appropriate callbacks. One way to do it isas follows:c○ 2000 by CRC Press LLC