ISFIELD Test for Existence of a Structure Field

Section: Inspection Functions

Usage

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.

Example

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