User`s guide

Creating Signals

3-39

For more information about creating signals, see the following sections:

•“Creating Signals Using Constant Blocks” on page 3-33

•“Creating Signals Using Signal Generator Blocks” on page 3-36

Example 1: Generating Sample-Based Output

In the model below, the Signal From Workspace creates a four-channel

sample-based signal with the following data:

•

Channel 1: 1, 2, 3, 0, 0,...

•

Channel 2: -1, -2, -3, 0, 0,...

•

Channel 3: 0, 0, 0, 0, 0,...

•

Channel 4: 5, 5, 5, 0, 0,...

To create the model, specify the following parameter values in the Signal From

Workspace block:

•

Signal = cat(3,[1 -1;0 5],[2 -2;0 5],[3 -3;0 5])

•Sample time = 1

•Samples per frame = 1

•Form output after final data value = Setting to zero

The Sample time setting of 1 yields a sample-based output with sample period

of 1 second. Each of the four elements in the matrix signal represents an

independent channel (the channel numbering is arbitrary). The

Form output

after final data value

parameter setting specifies that all outputs after the

third are zero.

Example 2: Generating Frame-Based Output

In the model below, the Signal From Workspace creates a two-channel

frame-based signal with the following data:

11–

22–

first matrix output

t=0t=1

33–

t=2

t=3