Mathematical Model

$$y(t) = u_{\text{index}}(t)$$

Inputs & Outputs

Direction	ID	Label	Type	Status
→ In	idx	Idx	number	Required
→ In	in	In	number	Required
← Out	out	Out	number	Output

Parameters

Parameters	Label	Type	Default	Description
numInputs	Number of Inputs	number	2
indexBase	Index Base	select	1

Usage Examples

• Zie de ingebouwde voorbeelden in de handleiding voor een demonstratie van dit blok.

Remarks & Best Practices

• Index clamping: The index input is rounded to the nearest integer and clamped to [1, numInputs] (or [0, numInputs-1] in 0-based mode); out-of-range indices always produce a valid output
• 0-based vs 1-based: Use indexBase = 0 when the index comes from another block that outputs zero-based indices (e.g., a counter starting at 0)
• Dynamic selection: The index can be a time-varying signal, allowing the selector to dynamically switch between inputs during simulation
• Unconnected inputs: If a selected data input is not connected, the output is 0.0
• Performance: Minimal overhead — index clamping and selection happen in a single step

Related Components

• Constant: Eenvoudige signaalbron