MATLAB Answers

Simon
0

Finding specfic string within another string

Asked by Simon
on 18 Sep 2017
Latest activity Answered by Lucas Silva on 26 Nov 2018
I am having trouble finding a specific part of a file path. The path is something along: \\blabla\blabla\blabla\blabla\blabla\blabla\04 - Black\05 - TEST
I need to find "04 - Black" in the path name. The name is changing and so is its position in the path - Therefor I need to find the first instance of 'XX - '. Afterwards I need to find the "05 - TEST" folder, which is also changing name and position.
Can anyone help?

  0 Comments

Sign in to comment.

5 Answers

Answer by KSSV
on 18 Sep 2017
Edited by KSSV
on 18 Sep 2017

str1 = '\\blabla\blabla\blabla\blabla\blabla\blabla\04 - Black\05 - TEST';
str2 = '04 - Black' ;
idx = strfind(str1,str2)
str1(idx:(idx+length(str2)-1))

  1 Comment

Jan
on 27 Sep 2017
Safer:
idx = strfind(str1, ['\', str2, '\'])

Sign in to comment.


Answer by José-Luis
on 18 Sep 2017

yourStr = '\blabla\blabla\blabla\blabla\blabla\blabla\04 - Black\05 - TEST'
re = '\\[0-9]{2}\s-\s[a-zA-Z]+';
result = regexp(yourStr,re,'match');

  1 Comment

Other possible regex, which is more permissive:
re = '\\[0-9]{2}\s-\s[^\\]+';
Allows anything that is not \ after the two digits, whitespaces, and dash.

Sign in to comment.


Answer by Guillaume
on 18 Sep 2017

if the aim is to obtain the name of the folder after the 'XX - ', then:
folder = regexp(path, '(?<=\\[0-9]{2}\s-\s[^\\]+\\)[^\\]+', 'match', 'once')

  0 Comments

Sign in to comment.


Answer by Cedric Wannaz
on 18 Sep 2017

Why not simply
>> str = '\\blabla\blabla\blabla\blabla\blabla\blabla\04 - Black\05 - TEST' ;
>> folders = regexp( str, '\d\d - [^\\]+', 'match' )
folders =
1×2 cell array
'04 - Black' '05 - TEST'

  5 Comments

Not in this direction ;-)
If he gets the path from PWD, DIR, FULLFILE, etc on a Windows machine, it will have backslashes.
Those functions may return backslashes, but you can use forward slashes in your strings that you make up and send into functions like that with no problems. Like Stephen says, Windows accepts either forward or backward slashes equally well.
Yes but we need to match a sub-string in this context and for this he needs to use the correct separator in the pattern, for REGEXP to work. He could use both for ending the match by defining the pattern as '\d\d - [^\\/]+'.
But again, if there is no problem in the "other direction" (because MATLAB can deal with either filesep), here both possibilities have to be managed, either by building the pattern using filesep or by making the pattern flexible enough.

Sign in to comment.


Answer by Lucas Silva on 26 Nov 2018

Eu tenho que fazer um processo semelhante, mas o método de separar as seqüências de caracteres é o ';' Eu tentei identificar o; como se fosse parte do comando, mas o matlab não aceita como.
Existe alguma maneira de obter essa informação?

  0 Comments

Sign in to comment.