When you create an array of MATLAB^{®} structures with the
intent of generating code, you must be sure that each structure field
in the array has the same size, type, and complexity.

Once you have created the array of structures, you can make
the structure fields variable-size using `coder.varsize`

.
For more information, see Declare a variable-size structure field..

You can create an array of structures from a scalar structure
by using the MATLAB `repmat`

function,
which replicates and tiles an existing scalar structure:

Create a scalar structure, as described in Define Scalar Structures for Code Generation.

Call

`repmat`

, passing the scalar structure and the dimensions of the array.Assign values to each structure using standard array indexing and structure dot notation.

For example, the following code creates `X`

,
a 1-by-3 array of scalar structures. Each element of the array is
defined by the structure `s`

, which has two fields, `a`

and `b`

:

... s.a = 0; s.b = 0; X = repmat(s,1,3); X(1).a = 1; X(2).a = 2; X(3).a = 3; X(1).b = 4; X(2).b = 5; X(3).b = 6; ...

To create a small array of structures, you can use the concatenation
operator, square brackets (` [ ] `

), to join one
or more structures into an array (see Concatenating Matrices).
For code generation, the structures that you concatenate must have
the same size, class, and complexity.

For example, the following code uses concatenation and a local function to create the elements of a 1-by-3 structure array:

... W = [ sab(1,2) sab(2,3) sab(4,5) ]; function s = sab(a,b) s.a = a; s.b = b; ...

Was this topic helpful?