forcing try catch loop during using another script

Question

ayman mounir 2019-8-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/475924-forcing-try-catch-loop-during-using-another-script

编辑： Walter Roberson 2019-8-20

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Hello People

I have a problem in try catch loop,

I have number of files and I analyze these files by calling another script which has the analysis code.

for example let's say in the main script I am writting as the following:

num_files=20
[filename, pathname] = uigetfile([strPathLife ...  '\...\*.xlsx;*.xlsm'], ..   'Excel-File auswählen',...  'MultiSelect','on')   %this mean the first fiel would be file(1), file(2),... etc
    for i=num_files
    try
        analysis_code(file(i))  % analysis_code is another script analyzes the data of the files
    catch
        disp('error')
    end
    end

according to this code it should analyze all the file disregarding if the there is error in analysing one file or more.

Thanks in advance

Ayman Mounir

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Stephen23 2019-8-13

See also original question: https://www.mathworks.com/matlabcentral/answers/475519-try-catch-loop-to-evaluate-what-contains-in-the-folder

Jackson Burns 2019-8-13

What is the problem? Can you provide an error or some more specific examples?

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Answer 1

chrisw23 2019-8-14

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https://ww2.mathworks.cn/matlabcentral/answers/475924-forcing-try-catch-loop-during-using-another-script#answer_387511

The analyze script should return a result code to be evaluated. To catch any analyze fail use the assert function. Error codes can be defined in the analyze function.

i.e. (user defined exceptions)

num_files=20
[filename, pathname] = uigetfile([strPathLife ...  '\...\*.xlsx;*.xlsm'], ..   'Excel-File auswählen',...  'MultiSelect','on')   %this mean the first fiel would be file(1), file(2),... etc
for i=num_files
    try
        msg = analysis_code(file(i))  % analysis_code is another script analyzes the data of the files
        assert(strcmp(msg,'No Error'),msg); % default msg = 'No Error'
    catch ex
        disp(ex.message)
    end
end

Hope it helps

Best regards Christian

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Adam Danz 2019-8-20

Why call assert()? Assert() generates an error and you're trying to avoid the error by the try/catch, right? Try removing assert() and see if the problem is fixed.

Walter Roberson 2019-8-20

编辑：Walter Roberson 2019-8-20

"My opinion is the try catch function is only local code I mean if i am calling another matlab file and it has an error the whole process will be stopped."

No, that is not correct. try/catch can trap error() or throw() calls generated by MATLAB routines any number of call levels below.

There are a small number of things that come to mind that try/catch cannot handle, which will abort all of the levels of calls