Re: S-function Builder and Dynamic Arrays


Adrian Suszko wrote:
Does anyone know if the s-function builder can use an array of
unknown size (ie a dynamic array) as input. If so how? There is a
column where you are supposed to specify the row size but if this is
unknown until the simulation runs what value should go there?

You can try putting -1, this the value that simstruc.h defines for the
enum DYNAMICALLY_SIZED which is what you'd use for dynamically sized
inputs. But I doubt the SFunction builder wizard supports this. I'd set
some default size, let the wizard create the SFunction, then edit the C
file manually and recompile it. Search help for the callback routines
that Simulink invokes when executing SFunctions, you'll need to use
these if you specify input port dimensions as DYNAMICALLY_SIZED; you
can use either ssSetInputPortMatrixDimensions or
ssSetInputPortVectorDimension for this.

Good luck,
Ashish.

.

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