Find handles with a specific pattern - matlab

Question

I have some handles that look like:
ans =
figure1: 189.0205
sampleNameEdit: 17.0216
selectCatPopup: 16.0237
radiobutton_Al: 14.0266
radiobutton_O: 190.0183
output: 189.0205
How can I easily look for those handles that start with radiobutton__? In the future, I will have many more radiobuttons that I would like to retrieve easily.

Answer 1

To search for a specific pattern in a handle's name, the best approach would be to follow Luis Mendo's advice in his answer. However, consider searching based on the type of object you are looking for. In this case, it would seem that all radiobutton objects need to be located.
The most straightforward way to find handles of for a certain style of uicontrol, is to search for handles with their Style Property set to radiobutton. Consider a figure with two controls: a text box and a radio button, with their handles stored in an ordinary array uih:
hf = figure; % parent of uicontrols
uih(1) = uicontrol('style','text');
uih(2) = uicontrol('style','radiobutton');
Here are my test handle vales (yours will be different):
>> uih
uih =
3.0012 4.0012
The first is the text box, and the second is the radio button.
Search by parent handle
If you have the parent handle (i.e. the figure handle, hf), you don't even need the list of handles uih! Just call findobj as follows:
hr = findobj(hf,'style','radiobutton')
hr =
4.0012
Search handle array
If you don't have the parent handle, but do have a list of handles to search, that's no problem either:
hr = findobj(uih,'style','radiobutton')
hr =
4.0012
Search struct of handles
In your case, you have the handles stored as fields in a struct:
handles =
ht: 3.0012
hr: 4.0012
hr = findobj(structfun(#(x)x,handles),'style','radiobutton')
hr =
4.0012
Don't worry, this finds all radio buttons!

Answer 2

Assuming you have a struct with each handle stored in a different field:
s.radiobutton_1 = 1; %// example data: struct with several fields
s.otherfield = 22;
s.radiobutton_2 = 333;
names = fieldnames(s); %// get all field names
ind = strmatch('radiobutton_',names); %// logical index to matching fields
selected = cellfun(#(name) s.(name), names(ind)); %// contents of those fields
returns the desired result:
selected =
1
333

Answer 3

It's not really clear where you get that ans from and what its structure is, and what exactly is supposed to "start with" "radiobutton_". However, if you want to get handles to all existing radiobuttons, findobj is the way to go:
h = findobj(findobj('Type', 'uicontrol'), 'Style', 'radiobutton');
You can restrict the search to children e.g. of the current figure using
h = findobj(findobj(gcf, 'Type', 'uicontrol'), 'Style', 'radiobutton');
and you can restrict the search to a given list of handles oh (without children) using
h = findobj(findobj(oh, 'flat', 'Type', 'uicontrol'), 'Style', 'radiobutton');