Can anyone knowledge me what is the meaning of this syntax?

S=stepinfo(ScopeData(1:size(ScopeData,1),2),ScopeData(1:size(ScopeData,1),1));
bright(i,1)= mean(ScopeData(round(S.SettlingTime*1000):size(ScopeData,1),2)); 
bright(i,2) = S.SettlingTime; 
bt(i,1) = (200- mean(ScopeData(round(S.SettlingTime*1000):size(ScopeData,1),2)))/10+S.SettlingTime;

Answer 1

[Jan]

Start with simplifying the code:

S           = stepinfo(ScopeData(:, 2), ScopeData(:, 1));
STime       = S.SettlingTime;
bright(i,1) = mean(ScopeData(round(STime*1000):end, 2)); 
bright(i,2) = STime; 
bt(i,1)     = (200 - bright(i,1)) / 10 + STime;

What is not clear now? Should we eplain the + operator or that ScopeData(:, 1) extracts the 1st column? Please ask explicitly, what is unclear. Explaining all would be as exhaustive as writing a book about how Matlab works.

Did you read the documentation of the used commands already? See e.g. stepinfo .

[Ahmad Nur Hasybi]

shich was called by scopedata? because in simulink i have many scopedata to monitor

[Jan]

@Ahmad Nur Hasybi: I do not understand, what you mean. Are you asking, where the variable ScopeData is coming from? Not from inside the code you have posted.