I want only one value stored in this code

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Folakemi Omotoye
Folakemi Omotoye 2018-8-1
编辑： Dennis 2018-8-2
I want to store a particular value in this loop, how can i do it please. the code is below
for t=1:1:30
s(t)=sum(v(t))+sum(v(1:t));
g(t)=v(t) - min(v(1:t));
if s(t) > 4
disp(t) %%%%%%%%line of interest
disp(v(t)) % if cumulative sum is greater than 4,note and display time of change
end
end
in the code above, the line (line of interest) displays the outcome of every iteration but i need it to only display the value of time t and the corresponding value of vector v when the threshold (4) is exceeded.
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Walter Roberson
Walter Roberson 2018-8-2
If that is your code, then the explanation would have to be that s(t) is greater than 4 for each of those iterations.
Did you want to know only the first time it happens? Do you want to stop calculating s when it happens, or do you want to continue calculating s but only display those values the first time it happens?
Folakemi Omotoye
Folakemi Omotoye 2018-8-2
to continue calculating s but display each time it exceeds 4

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Dennis
Dennis 2018-8-2
编辑：Dennis 2018-8-2
Does v actually contain negative values? Else every value in s will be greater 4 after it exceeds this threshold for the first time. Code below displays the first value of t and v(t) when this happens (needs adjustment if you want to change the increment of the loop).
for t=1:1:30
s(t)=sum(v(1:t));
g(t)=v(t) - min(v(1:t));
end
idx=find(s>4,1)
disp(v(idx));
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