How to make a loop end when you reach the end of some data

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AluminiumMan
AluminiumMan 2024-3-5
编辑： Voss 2024-3-6
I wish to implement a counter in MATLAB. The loop will increase a counter evertime some conditions are met.
I wish for the loop to cycle through each sample point in the data and then end when the loop has cycled through all data points in the variable.
How would I implement this?

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回答（1 个）

Voss
Voss 2024-3-5
counter = 0;
for ii = 1:numel(data)
if condition
counter = counter+1;
end
end
  2 个评论
AluminiumMan
AluminiumMan 2024-3-6
Thank you. What does the ii do? Is that a variable I need to declare?
Also I only want the counter to go up once each time the data reaches 0, and then I dont want the counter to be able to increase again until the data goes above 100 and then drops to zero again
Voss
Voss 2024-3-6
编辑：Voss 2024-3-6
You're welcome!
"What does the ii do?"
ii is the index variable of the for-loop.
https://www.mathworks.com/help/matlab/matlab_prog/loop-control-statements.html
"Is that a variable I need to declare?"
It is defined in the for statement. That's all you need to do to declare ii.
"Also I only want the counter to go up once each time the data reaches 0, and then I dont want the counter to be able to increase again until the data goes above 100 and then drops to zero again"
Maybe something like this then:
counter = 0;
data_hit_100 = false;
for ii = 1:numel(data)
if data(ii) >= 100
data_hit_100 = true;
end
if data_hit_100 && data(ii) <= 0
counter = counter+1;
data_hit_100 = false;
end
end

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