Check if Matlab struct, dynamic Field Value is empty

Question

I have a struct x, with dynamic Fields, respectively dynamic Field names. But basically, only the first Field is relevant for me. So I want to check if the Value of the first Field is empty, speak a 1x1cell or a 0x1cell..

or

I'm experimenting e.g. with:

isempty(fieldnames(x))
isempty(x(1))

if isempty(x(1))
    msgbox('empty')
else
    msgbox('result')
end

but got to no solution. Does anybody have a clue?

Speak, check if the Value of the first Field of the struct is empty or not..

Answer 1

If only the first field is relevant to you, then you can proceed as follows :

Get the fieldnames list of your struct

names=fieldnames(x);

Get the size of the first field

SizeOfFirstField=size(x.(names{1}));

Then you can just check if the first value in SizeOfFirstField is 0 or 1 in your if condition :

if SizeOfFirstField(1)==0
    msgbox('empty')
else
    msgbox('result')
end