Undefined operator '==' for input arguments of type 'struct'.

hey people I am getting this error while i am working on my project,what does this really mean????please help me out....this is the following code

 if f==iregion
     for jj = 1:10
            writeLED(bbb,'usr0',1)
            pause(0.05)
            writeLED(bbb,'usr0',0)
            pause(0.05)
     end
  end

Answer 1

[Alexandra Harkai]

It means f or iregion is a struct, and the '==' operator is not defined for that type. for structs, you can use isequal to compare if they are the same.