About "Matlab Fctn" block

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William
William on 16 Apr 2014
Commented: William on 16 Apr 2014
I included a for loop in the ML Fctn block.
function [xtest] x=(k)
for i=1:10
x=i
if (i>5)
x=k
else
x=i
end
end
I connected the output (x) to a "Time Scope" block. After the model runs for 20 sec, the Time Scope plot only the final value of x (x=k) instead of different values of x (1,2,3,4,5,5,5,..). How can I store or plot out all values of x? disp(x) will display values of x in Matlab window but I want to either store or plot x out (not just the final value).
Thanks.
Thanks.
I connected the output (x)

Accepted Answer

Azzi Abdelmalek
Azzi Abdelmalek on 16 Apr 2014
That's because the output of your Matlab Function block is the result of your for loop. The output is not the result of each iteration. You can use persistent declaration without a for loop, because Simulink will run your function automatically each step.
function x=fcn(k)
persistent i
if isempty(i)
i=0
end
i=i+1
x=i
if i>5
x=k
else
x=i
end
  1 Comment
William
William on 16 Apr 2014
Because I want to increase the value of x (similar to using a ramp function which is not availabe in Matlab) so I used for loop. How can I get around this?

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