User`s guide

Exporting Signals

3-73

to downsample a signal before exporting to the workspace, consider using the

Downsample or FIR Decimation blocks. See “Converting Sample Rates and

Frame Rates” on page 3-20 for more information about rate conversion.

The

Save format parameter allows you to save the output in a variety of

formats. The default is

Array, which is also generally the most accessible

output format. Although this format does not save a record of the sample times

corresponding to the output samples, you can create such a record for a given

model by selecting the

Time option in the Workspace I/O panel of the

Simulation Parameters dialog box. See “Performance-Related Settings” on

page 2-13 for more information.

The following sections explain how the To Workspace block generates its

output:

•“Exporting a Sample-Based Signal Using the To Workspace Block” on

page 3-73

•“Exporting a Frame-Based Signal Using the To Workspace Block” on

page 3-76

The following two sections may also be of interest:

•“Creating Signals Using the Signal From Workspace Block” on page 3-38

•“Constructing Multichannel Sample-Based Signals” on page 3-42

Exporting a Sample-Based Signal Using the To Workspace Block

Recall that a sample-based signal with M∗N channels is represented by a

sequence of M-by-N matrices. (The special case of M = N = 1 represents a

single-channel signal.) When the input to the To Workspace block is a

sample-based signal (and the

Save format parameter is set to Array), the

block creates an M-by-N-by-P array in the MATLAB workspace containing the

P most recent samples from each channel. The number of pages, P, is specified

by the

Limit data points to last parameter. The newest samples are added at

the back of the array.

The figure below illustrates this for a 6-by-4 sample-based signal exported to

workspace array