repsys

Replicate and tile models

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    Syntax

    rsys = repsys(sys,[M N])
    rsys = repsys(sys,N)
    rsys = repsys(sys,[M N,S1 S2 ... SK])

    Description

    rsys = repsys(sys,[M N]) replicates the model sys into an M-by-N tiling pattern. The resulting model rsys has size(sys,1)*M outputs and size(sys,2)*N inputs.

    example

    rsys = repsys(sys,N) creates an N-by-N tiling. This syntax produces the same result as rsys = repsys(sys,[N N]). To produce a diagonal tiling, use rsys = sys*eye(N).

    rsys = repsys(sys,[M N,S1 S2 ... SK]) replicates and tiles sys along both I/O and array dimensions to produce a model array. The indices S specify the array dimensions. The size of the array is [size(sys,1)*M, size(sys,2)*N, size(sys,3)*S1, ...].

    example

    Examples

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    Open Live Script

    Create a single-input single-output (SISO) transfer function.

    sys = tf(2,[1 3])
    sys =
 
    2
  -----
  s + 3
 
Continuous-time transfer function.
Model Properties

    Replicate the SISO transfer function to create a MIMO transfer function that has three inputs and two outputs.

    rsys = repsys(sys,[2 3])
    rsys =
 
  From input 1 to output...
         2
   1:  -----
       s + 3
 
         2
   2:  -----
       s + 3
 
  From input 2 to output...
         2
   1:  -----
       s + 3
 
         2
   2:  -----
       s + 3
 
  From input 3 to output...
         2
   1:  -----
       s + 3
 
         2
   2:  -----
       s + 3
 
Continuous-time transfer function.
Model Properties

    Alternatively, you can obtain the MIMO transfer function as follows:

    rsys = [sys sys sys; sys sys sys];
    Open Live Script

    Create a SISO transfer function.

    sys = tf(2,[1 3]);

    Replicate the transfer function into a 3-by-4 array of two-input, one-output transfer functions.

    rsys = repsys(sys,[1 2 3 4]);

    Check the size of rsys.

    size(rsys)
    3x4 array of transfer functions.
Each model has 1 outputs and 2 inputs.

    Input Arguments

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    Dynamic system (SISO or MIMO), specified as one of the following dynamic system models or an array of such models.

    • Continuous-time or discrete-time numeric LTI models, such as tf, zpk, or ss models.

    • Generalized or uncertain LTI models such as genss or uss (Robust Control Toolbox) models. (Using uncertain models requires Robust Control Toolbox™ software.)

    • Frequency-response data models, such as frd models.

    • Identified LTI models, such as idtf (System Identification Toolbox), idss (System Identification Toolbox), or idproc (System Identification Toolbox) models. (Using identified models requires System Identification Toolbox™ software.)

    Number of replications of sys along the output dimension, specified as a positive integer.

    Number of replications of sys along the input dimension, specified as a positive integer.

    Numbers of replications of sys along array dimensions, specified as positive integers.

    Output Arguments

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    Replicated dynamic system, returned as a dynamic system model or model array.

    If you specify sys as a single SISO or MIMO model and you do not specify array dimensions S1,..., SK, then rsys is a dynamic system model with size(sys,1)*M outputs and size(sys,2)*N inputs.

    Otherwise, rsys is an array of dynamic systems, each with size(sys,1)*M outputs and size(sys,2)*N inputs. The size of rsys is [size(sys,1)*M, size(sys,2)*N, size(sys,3)*S1, ...].

    Version History

    Introduced in R2010b

    See Also