Using Simulink    

Signal Glossary

The following table summarizes the terminology used to describe signals in the Simulink user interface and documentation.

Term
Meaning
Complex signal
Signal whose values are complex numbers.
Data type
Format used to represent signal values internally. See Working with Data Types for more information.
Matrix
Two-dimensional signal array.
Real signal
Signal whose values are real (as opposed to complex) numbers.
Scalar
One-element array, i.e., a one-element, 1-D or 2-D array.
Signal bus
Signal created by a Mux or Demux block.
Signal propagation
Process used by Simulink to determine attributes of signals and blocks, such as data types, labels, sample time, dimensionality, and so on, that are determined by connectivity.
Size
Number of elements that a signal contains. The size of a matrix (2-D) signal is generally expressed as M-by-N where M is the number of columns and N is the number of rows making up the signal.
Vector
One-dimensional signal array.
Virtual signal
Signal that represents another signal or set of signals.
Width
Size of a vector signal.


  About Signals Determining Output Signal Dimensions