check if a variable in a structure exist

Hello, I must check if the variable handles.Y2 exists in the structure handles(I work with gui). Using exist gives me 0 although it exist in the structure thanks

Answer 1

[dpb]

isfield(handles,'Y2')

doc isfield  % for details
help struct  % for reminder on structures

Answer 2

[Sara]

Use:

ispresent = isfield(handles,'Y2')

See

   help isfield

for more infos.

[Alon]

thank u too!