Variable Size for Arrays and Matrices

The size of an array or matrix is determined when the element is created. In addition, ASCET allows the determination of normal arrays/matrices with variable sizes.

Note
Arrays/matrices used as messages and arrays/matrices of record type cannot have variable sizes.

A common use case for arrays/matrices with variable size is to have a method that accepts arrays/matrices of any size, and then compute the average, min, max, etc. inside the method.

The following rules apply:

Only arrays and matrices that are references can be of variable size.
This means composite method arguments and return values, as well as method-/process-/runnable-local variables and arrays/matrices with activated Reference option.
Only arrays and matrices with kind Variable can be of variable size.
For a matrix, either both dimensions or no dimension must be of variable size.
A mixed mode, i.e. one dimension with variable size, the other with fixed or variant size, is not possible. If you try to specify such a matrix, an error window opens, and you have to change the matrix specification.

If you use an array or matrix with variable size, keep the following in mind:

Index protection (see Code Generation Options, Protected Vector Indices) uses the actual size of the array or matrix.
If an array/matrix instance (i.e. no reference) with variable size is detected during code generation, an error of type MMdl787 is issued:
Element <name> has variable array/matrix reference flag but is no reference.
An array/matrix reference of fixed or variant size must not be assigned to an array/matrix reference of variable size. If such an assignment is detected during code generation, an error of type MMdl789 is issued:
Fixed/variant reference <name> cannot be converted to variable reference.
Models that use arrays/matrices with variable size can only be exported to ASCET V6.3.0 or newer.
Models that use arrays larger than 2048 elements or matrices with one or both axes larger than 63 can only be exported to ASCET V6.4.3 or newer.
The generated initialization code for arrays/matrices with variable size is not affected by the setting of the Generating Sparse Arrays target option.