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How to state a while condition to prevent an action?

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Stelios Fanourakis
Stelios Fanourakis 2018-4-29
关闭： MATLAB Answer Bot 2021-8-20
Hi I have a code that adds the .dcm extension to files they don't have .dcm extension. The problem is that whenever I run the script, it keeps adding .dcm extension forever and ever. For instance a file named S009 can be like S009.dcm.dcm.dcm if I run the script three times. I need a close a while statement to check if the file has .dcm extension and if true to leave it as it is.
Any idea?
Thanks in advance

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Star Strider
Star Strider 2018-4-29
You can test for the presence of the ‘.dcm’ extension easily enough:
has_dcm = ~isempty(strfind(filename, '.dcm')); % Statement
has_dcm = @(fname) ~isempty(strfind(fname, '.dcm')); % Anonymous Function
This will return ‘true’ (logical 1) if it already has a ‘.dcm’ extension and 0 if it does not. You can use it to test for the presence of the extension, then add it if the result is 0 and branch around that if the result is 1.
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Stelios Fanourakis
Stelios Fanourakis 2018-4-30
Although it seems right. Still I cannot implement it right. I wrote it as you stated and it doesn't prohibit the .dcm extension to be added once more time. I run it 9 times and I got 9 .dcm, extensions in row
Star Strider
Star Strider 2018-4-30
My solution worked when I tested it.
I would have to see the relevant parts of your code to see if I can understand what the problem is with it.

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