MATLAB Answers

repeat the iteration with an error using try/catch

조회 수: 5(최근 30일)
Mos_bad
Mos_bad 3 Apr 2020
편집: James Tursa 4 Apr 2020
I wrote a nested for loop to exexcute a huge number of iterations. However, sometimes an error stops the program. I want to repeat the iEv'th iteration in case an error occurs and then continue to next iteration. Please see below the code and let me know if it should be modified.
for iTcm=1:nTcm
for iScen=1:nScen
for iEv=1:nEv
try
MyProgramHere
catch ME
disp(ME);
fprintf('Retrying the program...\n');
end
end
end
end

  댓글 수: 0

로그인 to comment.

채택된 답변

James Tursa
James Tursa 3 Apr 2020
편집: James Tursa 3 Apr 2020
Maybe this construct does what you want
while( true )
try
MyProgramHere
break
catch ME
disp(ME);
fprintf('Retrying the program...\n');
end
end

  댓글 수: 3

Mos_bad
Mos_bad 3 Apr 2020
James if you mean the following code, yes it works. I added iEv = iEv - 1 after cath ME.
My concern is if an error occurs within the iEv'th iteration, is the iEv'th iteration repeated? or the program skips the iEvth iteration where the error occurs and goes to next iteration (iEv+1)?
for iTcm=1:nTcm
for iScen=1:nScen
for iEv=1:nEv
while (true)
try
MyProgram
break
catch ME
iEv = iEv - 1;
disp(ME);
fprintf('Retrying the program...\n');
end
end
end
end
end
Mos_bad
Mos_bad 3 Apr 2020
This code didn't work either. Any help?
James Tursa
James Tursa 3 Apr 2020
No. I meant exactly what I wrote, without this line:
iEv = iEv - 1; % delete this line
By getting rid of this line, it will keep repeating the same iteration indefinitely until it passes. iEv doesn't change until you do the iteration successfully. If you want a limit on the number of tries before you generate an error then additional code would need to be added.

로그인 to comment.

추가 답변(1개)

darova
darova 3 Apr 2020
편집: darova 3 Apr 2020
My proposition
for iTcm=1:nTcm
for iScen=1:nScen
iEv = 0;
while iEv <= nEv
iEv = iEv + 1;
try
MyProgramHere
catch ME
iEv = iEv-1;
disp(ME);
fprintf('Retrying the program...\n');
end
end
end
end

  댓글 수: 4

표시 이전 댓글 수: 1
darova
darova 3 Apr 2020
How is it possible? Can you be more specific?
darova
darova 3 Apr 2020
What about this. I improved my code
Mos_bad
Mos_bad 3 Apr 2020
With the improved code, when the iEv count reaches to nEv, the program control goes immediately to the catch block. So the program stops without going to (iScen+1)th iteration.

로그인 to comment.

이 질문에 답변하려면 로그인을(를) 수행하십시오.


Translated by