EXTRACT NUMBER FROM A COMBINED STRING AND NUMBERS
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I have for example the following string 'mario5.png' or 'Julian15.png' and want to extract the numbers from there in the first case 5 in the second case 15. Can anyone tell me which function to look for?
回答（3 个）
David Sanchez
2014-6-13
use str2double to get it in double format:
output = str2double(String(regexp(String , '[0-9]')))
output =
5
otherwise your output will be a string.
If the number is bigger than 9, you can make a slight modification to the answer by David Sanchez:
output = str2double(String(regexp(String , '[0-9]+')))
This will work for positive integers. The "+" means "one or more". You can also skip a step by requesting that regexp return the matching part of the string instead of the index of the match:
output = str2double(regexp(String , '[0-9]+', 'match'))
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