How to save a data when something happens
2 vues (au cours des 30 derniers jours)
Afficher commentaires plus anciens
Hello everybody, I am receiving 100 symbols, with values starting from 0 and go to 1. The scenario is like this.
for i=1:100
if Symbolvalue >= 0.5
Nuberofsymbolvalue=i;
end;
end;
I need to save the the first i in which I go above 0.5
Thanks in advance.
0 commentaires
Réponses (3)
Image Analyst
le 17 Nov 2013
Modifié(e) : Image Analyst
le 17 Nov 2013
if symbolValue > 0.51
savedSymbolValue = symbolValue;
% Optionally save to a mat file
save(yourMatFileName, 'savedSymbolValue');
end
5 commentaires
Image Analyst
le 18 Nov 2013
Please mark the best answer as "Accepted" if you're done with this topic. Thanks.
Umair Nadeem
le 17 Nov 2013
Modifié(e) : Umair Nadeem
le 17 Nov 2013
you can use this
index = 1;
for i = 1:100
if SymbolValue >= 0.5
NumberofSymbolValue[index] = i;
index += 1;
end
end
Valueoffirst_i = NumberofSymbolValue[1];
The first value in array NumberofSymbolValue will show the first i
Hope it helps
4 commentaires
Image Analyst
le 17 Nov 2013
Modifié(e) : Image Analyst
le 17 Nov 2013
How did it work? Are you programming in C? MATLAB doesn't use [] around array indexes and doesn't have the += operator. Plus, his solution could be done with a non-looping simple call to find like Walter and my solution.
allHighSymbolIndexes = find(Symbolvalue >= 0.5)
Walter Roberson
le 17 Nov 2013
find(Symbolvalue >= 0.5, 1, 'first')
2 commentaires
Image Analyst
le 17 Nov 2013
Just assign the output to something:
firstHighSymbolIndex = find(Symbolvalue >= 0.5, 1, 'first')
theFirstHighSymbol = Symbolvalue(firstHighSymbolIndex);
We don't know why it didn't work because you didn't show your code. The code you used (a for loop) is not vectorized and not as MATLAB-ish but is probably still fast enough.
Voir également
Catégories
En savoir plus sur Logical dans Help Center et File Exchange
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!