Using the global operator

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ektor
ektor 2019-5-9
评论： Walter Roberson 2019-5-9
I have a function below.
As you can see if t==1 I create a vector kk. However, I can not use this kk in the 'else' statement unless I use 'global kk''. Is that correct?
function [ll mm]= ssample(e2,t)
global kk
if t==1
kk=zeros(T,1);
for s=1:T
kk(s) =...;
end
else
for s=t:T
ll =kk(s) ;
end
end
mm=kk;
end
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ektor
ektor 2019-5-9
I edit my question. t is defined and it starts from t=1. Should I use global?
Walter Roberson
Walter Roberson 2019-5-9
We would need the calling code to be sure that t starts at 1.
Better to avoid the matter, such as the way Matt suggests.

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采纳的回答

Matt J
Matt J 2019-5-9
No, you should not use global. Your code should look like this:
function [ll, mm, kk]= ssample(e2,t,kk)
...
end

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