How to continue execution of textscan if it cannot match formatSpec to the data

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Yaameen 2015-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/222870-how-to-continue-execution-of-textscan-if-it-cannot-match-formatspec-to-the-data

回答： Star Strider 2015-6-7

34,35,36,
34,35,36,37,
34,35,36,

Let say I have the above 3 lines of data which I am reading using textscan. Let say textscan's formatSpec is '%d %d %d'. Then in this case it stops after 1st data line. So I would like to implement a script which continues with another formatSpec if textscan couldn't match initial formatSpec. How can I do it? The logic is below.

fmt_one = '%d %d %d';
fmt_one = '%d %d %d %d';
C = textscan(fileID,'%d %d %d');
if textscan stopped
C = textscan(fileID,'%d %d %d %d');

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Answer 1

Star Strider 2015-6-7

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https://ww2.mathworks.cn/matlabcentral/answers/222870-how-to-continue-execution-of-textscan-if-it-cannot-match-formatspec-to-the-data#answer_181881

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I would use:

C = textscan(fileID,'%d %d %d %d');

adding the appropriate 'Delimiter', 'CollectOutput', 'EndOfLine' and other name-value pairs as required. If textscan encounters a blank space, it should substitute NaN for the missing value.