| FreeMat
    | 
Section: Inspection Functions
Given a structure array, tests to see if that structure array contains a field with the given name. The syntax for its use is
y = isfield(x,field)
 and returns a logical 1 if x has a field with the name field and a logical 0 if not. It also returns a logical 0 if the argument x is not a structure array. 
Here we define a simple struct, and then test for some fields
--> a.foo = 32
a = 
    foo: 32
--> a.goo = 64
a = 
    foo: 32
    goo: 64
--> isfield(a,'goo')
ans = 
 1 
--> isfield(a,'got')
ans = 
 0 
--> isfield(pi,'round')
ans = 
 0