How can I read in a number from a file name?

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In my program the user selects a dicom file and I need to know a number that is contained within the file name.
For example, the file name could be "Image10_processed.dcm", and I want to take the 10 so I can use that to find the corresponding info in another file.
Is there a way that I can break the file name down and just take the number? I've looked elsewhere and there seems to be no simple solutions.
Any help is much appreciated.

Accepted Answer

Shruti Sapre
Shruti Sapre on 20 Nov 2015
Hi Jack,
If you are storing the name of the file as a string, you can do something like this:
>>startIndex = sscanf(str, 'Image%d');
(I am assuming that the file name beings with "Image" here)
You could also use "regexp":
>>str='Image10_processed.dcm'
>>expression = '[0-9]';
>>str(startIndex)
Hope this helps!
-Shruti
  1 Comment
Jack Miskell
Jack Miskell on 24 Nov 2015
Thank you for your help Shruti.
In the end I used regexp.
Thanks again!
Jack

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