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how to extract file name

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yan abr
yan abr 2017-12-12
评论： yan abr 2017-12-12
Hi I am trying to extract a file name but i don´t want to extract it´s entire name.For example if i have 30 people with 3 different expressions each. I name them as 0101.txt...0103.txt,...,3001.txt...3003.txt. How could i extract only the first 2 digits that represent individual person? Thank you.

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per isakson
per isakson 2017-12-12
编辑：per isakson 2017-12-12
If I got you question right
cac = { '0101.txt', '0103.txt', '3001.txt', '3003.txt' };
out = regexp( cac, '^\d{2}', 'match' );
out{:}
outputs
ans =
'01'
ans =
'01'
ans =
'30'
ans =
'30'
  1 个评论
yan abr
yan abr 2017-12-12
i need to continue with another process on this..but at this stage i got your answer. Thank you very much sir.

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