Matlab Function block: how to output the result in different instants of time

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Hello everybody,
is there a way to output the result of a Matlab Function block in Simulink in different instants of time? In other words, assuming that my function block contains this trivial code, and suppose to link it to a display block:
input = 5;
for i = 1:10
pause(1); % I know, it doesn't work, I write it just for explain that I want to output the result of the computation every 1 sec
output = i*input;
end
if I run a simulation on Simulink, it outputs directly 50. I would read on the display 5...10...15......50, where ... it stands for "1 sec pause". How can I do it?
Thanks.

Accepted Answer

Honglei Chen
Honglei Chen on 21 Jul 2014
The MATLAB Function block is called once at each time instance so to do what you want, you need to have a state that updates at each time hit. Here is a simple example of that using persistent variables
function y = fcn
%#codegen
persistent u
if isempty(u)
u = 0;
else
u = u+1;
end
y = 5*u;
You should set the simulink solver to discrete with fixed step, and you can set the time step to 1.
HTH

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