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regexstringmatlab
Eghbal
Eghbal

Reputation: 3793

How remove end part of a path (string) using regular expression in MATLAB?

Suppose that we have these strings in MATLAB:

xx = 'C:/MY_folder/This_gg/microsoft/my_file';

or

xx = 'C:/end_folder/This_mm/google/that_file';

I want remove expression after end / (my_file and that_file). How can I do this using regular expression in MATLAB?

Upvotes: 2

Views: 3202

Answers (4)

LuettgeM
LuettgeM

Reputation: 163

Instead of regexp you can use fullfile, that is independent if there is '\' or '/'

yy = fullfile(xx, '..')

This returns the string 'xx\..'.

zz = fullfile(yy, 'newfolder')

This returns the string 'xx\..\newfolder' but it parses correctly on dir() and other functions.

Of course you can go back and forth in one line.

zz = fullfile(xx, '..', 'newfolder')

Upvotes: 1

Livio D.P.
Livio D.P.

Reputation: 71

If you want to remove last word try this:

yy = regexprep(xx,'(\w+)$','');

This find last word in the string and replaces it by empty string.

You can see the regex in following link: Regex101.com - Select last word

Upvotes: 1

Luis Mendo
Luis Mendo

Reputation: 112749

  1. If you want to also remove the final /, use

    yy = regexprep(xx, '/[^/]*$', '');

    The regexp pattern '/[^/]*$' matches a / followed by any number of non-/ at the end of the string. The match is replaced (regexprep) by the empty string.

  2. If you want to keep the final /, you can modify the regexp with a lookbehind assertion:

    yy = regexprep(xx, '(?<=/)[^/]*$', '');

    or in 1 replace by '/' instead of by '':

    yy = regexprep(xx, '/[^/]*$', '/');

Upvotes: 1

Algar
Algar

Reputation: 5984

I know you're asking for a regular expression but there's a simpler way:

pathStr = fileparts(xx)

Or, if you want all parts of the file

[pathStr, name, ext] = fileparts(xx)

Upvotes: 3

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