Add Available serial port into pop up menu

Hi,

I wish to get a list of available serial port in my computer and display them in the pop up menu. code:

a=instrfind('Type','Serial');
for i=1:length(a)
text{i}=a(i);
end
set(handles.popup1,'String',text);
guidata(hObject,handles);

but, there's nothing shown in the pop up menu. May i know which part i did wrongly? Thanks

[Walter Roberson]

Please do not name a variable "text" as that conflicts with the important graphic function "text".

Answer 1

[Walter Roberson]

a = instrfind('Type','Serial');
for i = 1:length(a)
portnames{i} = get(a(i), 'Port')
end
set(handles.popup1, 'String', portnames);

[Shawn Chang]

Hi, thanks for the replied. But, yet I still can't get the available port even though i change the "text" to "portnames". The result I get here is empty array. Is there any part going wrong?

[Walter Roberson]

Could you show me

size(a)

and

get(a(1))

[Shawn Chang]

size(a)

ans =

0 0

>> get(a(1))

??? Index exceeds matrix dimensions.