for loop won't stop using break
显示 更早的评论
I'm using ARMA to simulate and predict a series of data. "i" represens the number of pre-sample for ARMA estimate and "j" represents the number of estimation sample for ARMA estimate.
The absolute percentage errors (APE) are calculated for different numbers of pre-sample and estimate sample data.
I want to stop the loop when the APE is small than 0.05. I used break function, but it won't stop until it finishes all the loops (till i=60, j=60)
Mdl = arima(1,0,0);
APE = zeros(60,108);
for i = 12:60
for j = i:120-i
EstMdl = estimate(Mdl,Y_out((i+1):(i+j)),'Y0',Y_out(1:i));
gasforecast = forecast(EstMdl,180-i-j,'Y0',Y_out((i+1):(i+j)));
APE(i,j) = abs(gasforecast(end)-Y_out(end))/Y_out(end);
if APE(i,j) < 0.05
break;
end
end
end
回答（1 个）
Walter Roberson
2021-2-4
Mdl = arima(1,0,0);
APE = zeros(60,108);
stopping = false;
for i = 12:60
for j = i:120-i
EstMdl = estimate(Mdl,Y_out((i+1):(i+j)),'Y0',Y_out(1:i));
gasforecast = forecast(EstMdl,180-i-j,'Y0',Y_out((i+1):(i+j)));
APE(i,j) = abs(gasforecast(end)-Y_out(end))/Y_out(end);
if APE(i,j) < 0.05
stopping = true;
break;
end
end
if stopping; break; end
end
类别
在 帮助中心 和 File Exchange 中查找有关 Conditional Mean Models 的更多信息
产品
2021-2-4
2021-5-9
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!
Translated by 
