STRUCT Structure Array Constructor
Section: Variables and Arrays
Usage
Creates an array of structures from a set of field, value pairs. The syntax isy = struct(n_1,v_1,n_2,v_2,...)
where n_i
are the names of the fields in the structure array, and
v_i
are the values. The values v_i
must either all be
scalars, or be cell-arrays of all the same dimensions. In the latter
case, the
output structure array will have dimensions dictated by this common
size. Scalar entries for the v_i
are replicated to fill out
their dimensions. An error is raised if the inputs are not properly matched (i.e., are
not pairs of field names and values), or if the size of any two non-scalar
values cell-arrays are different.
Another use of the struct
function is to convert a class into a
structure. This allows you to access the members of the class, directly
but removes the class information from the object.
Example
This example creates a 3-element structure array with three fields,foo
bar
and key
, where the contents of foo
and bar
are provided
explicitly as cell arrays of the same size, and the contents of bar
are replicated from a scalar.
--> y = struct('foo',{1,3,4},'bar',{'cheese','cola','beer'},'key',508) y = Fields foo bar key --> y(1) ans = foo: 1 bar: cheese key: 508 --> y(2) ans = foo: 3 bar: cola key: 508 --> y(3) ans = foo: 4 bar: beer key: 508
An alternate way to create a structure array is to initialize the last element of each field of the structure
--> Test(2,3).Type = 'Beer'; --> Test(2,3).Ounces = 12; --> Test(2,3).Container = 'Can'; --> Test(2,3) ans = Type: Beer Ounces: 12 Container: Can --> Test(1,1) ans = Type: 0 Ounces: 0 Container: 0