About "Matlab Fctn" block

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William
William 2014-4-16
评论： William 2014-4-16
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)

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采纳的回答

Azzi Abdelmalek
Azzi Abdelmalek 2014-4-16
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 个评论
William
William 2014-4-16
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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