Extracting a vector element every timestep as the simulation runs

Question

I have a 1D vector (y) in the workspace that has elements in it. I want these elements to amplify the magnitude of a sine-wave (through a multiplication box). How do I tell simulink to extract only one element on every timestep for the multiplication?

Answer 1

The variable used in the From Workspace block must have a specific format. Press the Help button on the block for a discussion of those formats.

All of them require a time vector to be specified in addition to the signal value. For instance,

t = 0:0.1:10;
u = rand(size(t));
tu = [t(:) u(:)];

would create a suitable input that makes the block output a random value, with the value changing every 0.1s.