finding string in between

8 vues (au cours des 30 derniers jours)
sensation
sensation le 18 Oct 2017
Commenté : sensation le 19 Oct 2017
Hi, so I have a cell string with 100 X 1 like:
18WABO1-12345-0X
18WABO2-12345-0N
18WACE3-12345-00
18WACE4-12345-0R
18WAGUG-12345-0G
18WDUER-12345-0N
I would like to find the string sequence that is always between 18W and first - so the result is:
ABO1
AB02
ACE3
ACE4
AGUG
DUER etc
my example of a code:
%
somestring(:)= eic_p;
underscore_indices= strfind(somestring,'18W');
underscore_indices=cell2mat(underscore_indices);
fs_indices = strfind(somestring,'-');
fs_indices=fs_indices';
your_number=cellfun(@(v)v(1),fs_indices);
somestring(:)= somestring';
for i=1:length(fs_indices)
yourNumber= somestring{i}(underscore_indices(i)+2:your_number(i)-1);
%HOW i can save every iteration? thanks
end
in the last for loop somehow I am getting the weird output and can not save all results so I can have all those 205 abbreviations in one variable (yourNumber).
Thanks a lot,

Réponse acceptée

per isakson
per isakson le 18 Oct 2017
Modifié(e) : per isakson le 18 Oct 2017
yourNumber is overwritten in the loop and only the last value is saved. The first step to fix your code is
yourNumber = cell( length(fs_indices), 1 );
for i = 1 : length(fs_indices)
yourNumber{i} = somestring{i}(underscore_indices(i)+2:your_number(i)-1);
end
There are other ways, e.g. with regular expressions
>> str = '18WABO1-12345-0X';
>> regexp( str, '(?<=18W)[^\-]+(?=\-)', 'match' )
ans =
'ABO1'
and
cac = {
'18WABO1-12345-0X'
'18WABO2-12345-0N'
'18WACE3-12345-00'
'18WACE4-12345-0R'
'18WAGUG-12345-0G'
'18WDUER-12345-0N' };
%
out = regexp( cac, '(?<=18W).+?(?=\-)', 'match' );
out = cat( 1, out{:} );
and
>> out
out =
'ABO1'
'ABO2'
'ACE3'
'ACE4'
'AGUG'
'DUER'
and with indexing
>> str = char( cac );
>> str = str( :, 4:7 )
str =
ABO1
ABO2
ACE3
ACE4
AGUG
DUER
>>
  10 commentaires
Stephen23
Stephen23 le 19 Oct 2017
"where I can find those expressions when I should use ? ^ or/and +."
By reading the documentation ten times:
And then read it another ten times. And practice lots.
Regular expressions are powerful and very useful, but they require practice and attention to detail. Study that page I linked to, and the other pages that it links to as well.
sensation
sensation le 19 Oct 2017
Thanks!

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