DSP Blockset

Example: Exporting a Sample-Based Matrix Signal.   In the model below, the To Workspace block exports a four-channel sample-based signal with the following data:

• Channel 1: 1, 2, 3, 4, 5,..., 100, 0, 0, 0,...
• Channel 2: -1, -2, -3, -4, -5,..., -100, 0, 0, 0,...
• Channel 3: 0, 0, 0, 0, 0,...
• Channel 4: 5, 5, 5,..., 0, 0, 0,...

The first four consecutive samples are shown in the figure.

To create the model, define the following variables at the MATLAB command line.

sig1 = reshape(1:100,[1 1 100])   % 1-by-1-by-100 array
sig2 = reshape(-1:-1:-100,[1 1 100])% 1-by-1-by-100 array
sig3 = zeros(1,1,100)             % 1-by-1-by-100 array
sig4 = 5*ones(1,1,100)            % 1-by-1-by-100 array
sig12 = cat(2,sig1,sig2)          % 1-by-2-by-100 array
sig34 = cat(2,sig3,sig4)          % 1-by-2-by-100 array
A = cat(1,sig12,sig34)            % 2-by-2-by-100 array

Array A represents a four-channel signal with 100 samples.

Specify the following parameter values in the Signal From Workspace block:

• Signal = A
• Sample time = 1
• Samples per frame = 1
• Form output after final data value = Setting to zero

Specify the following parameter values in the To Workspace block:

• Variable name = yout
• Limit data points to last = inf
• Decimation = 1
• Sample time = -1
• Save format = Array

Run the model, and look at output yout. The first four samples (pages) are shown below.

yout(:,:,1:4)
ans(:,:,1) =
     1    -1
     0     5
ans(:,:,2) =
     2    -2
     0     5
ans(:,:,3) =
     3    -3
     0     5
ans(:,:,4) =
     4    -4
     0     5

Exporting a Sample-Based Signal Using the To Workspace Block

Exporting a Frame-Based Signal Using the To Workspace Block