Removing repeat displays in Matlab

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James
James on 2 Apr 2015
Edited: A Jenkins on 2 Apr 2015
I am modelling a landing gear system and would like to be notified in the Matlab command space when it has been deployed
To do this I have a matlab function block in simulink with the following code:
--------------------------------------------
function y = fcn(u)
if u >= 0.5
disp('Nose LG Door 2 Deployed')
end
y = u;
-----------------------------------------
However I only want the display of Nose LG Door 2 Deployed to come up once in the command window, except currently it is constantly repeating until the simulation ends.
Does anyone know how to make it only appear once?

Answers (1)

A Jenkins
A Jenkins on 2 Apr 2015
Edited: A Jenkins on 2 Apr 2015
function y = fcn(u)
persistent previous_u
if isempty(previous_u)
previous_u=0;
end
if u >= 0.5 && previous_u < 0.5
disp('Nose LG Door 2 Deployed')
end
previous_u=u;
y = u;

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