Problem with try/catch

Question

Mahith Madhana Kumar 2021-3-1

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/759064-problem-with-try-catch

评论： Mahith Madhana Kumar 2021-3-1

采纳的回答： KALYAN ACHARJYA

Hi all,

I am experiencing a problem with the try/catch function. When I run the below script:

x=1:1:10;

for i=1:length(x)

try

if (x(i)==5)

disp('Success');

end

catch

disp('Dot index error');

continue

end

I am only getting a single output corresponding to the part when x(i)==5. Its not displaying the "Dot index error" for other values. I am not sure where I am doing wrong.

I looked into this similar post - https://www.mathworks.com/matlabcentral/answers/108074-try-catch-problems-with-matlab-2013 but that didnt have any follow up answers.

Thank you your help.

2 个评论
显示无隐藏无

Stephen23 2021-3-1

"Its not displaying the "Dot index error" for other values."

I don't see any reason why it should: nothing in your code would obviously throw an error.

"I am not sure where I am doing wrong."

You are not doing anything wrong: nothing wrong means no error, which means no catch execution.

If no error occurs in your code, what error do you expect try to detect?

Mahith Madhana Kumar 2021-3-1

Oh yea. That makes sense. I was thinking the catch statement would be executed just like the else part of an if statement - my wrong. Thank you.

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

KALYAN ACHARJYA 2021-3-1

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/759064-problem-with-try-catch#answer_635839

编辑：KALYAN ACHARJYA 2021-3-1

在 MATLAB Online 中打开

Have you read the document of try catch Doc fucntion?

If any statement in a try block generates an error, program control goes immediately to the catch block, which contains your error handling statements.

x=5;
try
 if x==5
 kkdisp('Success');% Error undefined fucntion kkdisp
 end
catch
 disp('Dot index error');
end

What are you trying to do?

4 个评论
显示 2更早的评论隐藏 2更早的评论

Mahith Madhana Kumar 2021-3-1

编辑：Mahith Madhana Kumar 2021-3-1

Can we achieve the same output using try/catch function?

KALYAN ACHARJYA 2021-3-1

在 MATLAB Online 中打开

It can be done anyway, its all about "Jugaad", is there any sense? The purpose of the function "Execute statements and catch resulting errors" (Error Handiling)

x=1:10;
for i=1:length(x)
try
 if x(i)~=5 
 % Any Error syantax
 HelloErrorHere
 disp('Success');
 else 
 disp('Success');  
 end
catch
 disp('Dot index error');
end
end  

Result:

Dot index error
Dot index error
Dot index error
Dot index error
Success
Dot index error
Dot index error
Dot index error
Dot index error
Dot index error
>> 