MATLAB Answers

Matching certain characters of strings

3 views (last 30 days)
Christiaan
Christiaan on 25 Feb 2013
Say I have a big cell array of strings (they are item numbers), and I want to say:
If string matches '140xx1', then Type = 1,
If string matches '140xx2' then Type = 2,
If string matches '140xx3' then Type = 3,
If string matches '145xxx' then Type = 4,
(where x can be any character).
How can I do this in MATLAB?
Many thanks,
Chris

  0 Comments

Sign in to comment.

Answers (4)

Thorsten
Thorsten on 25 Feb 2013
item_number_list = { '140xx3' '140xx3' '140xx1' '145xxx' '140xx2' '140xx3'};
item_numbers = {'140xx1' '140xx2' '140xx3' '145xxx'};
for i=1:length(item_number_list)
item_type(i) = find(strcmp(item_numbers, item_number_list{i}));
end

  1 Comment

Christiaan
Christiaan on 25 Feb 2013
Thanks, but I don't think this solves the problem. 'x' could appear as any character in the item number list (it could be a '1', an 'A', etc). For example, it could be:
item_number_list = { '140003' '140013' '140001' '145012' '140022' '140123'};
Any more suggestions? I think I may have to use regexp, but I'm not really sure how to make it do this.

Sign in to comment.


Thorsten
Thorsten on 25 Feb 2013
Oh, I haven't realized that x were meant as placeholders for any number. In this case, use
item_numbers = {'140xx1' '140xx2' '140xx3' '145xxx'};
item_number_list = { '140003' '140013' '140001' '145012' '140022' '140123'};
for i=1:length(item_number_list)
item = item_number_list{i};
item(4:5) = 'xx';
if item(3) == '5', item(6) = 'x'; end
item_type(i) = find(strcmp(item_numbers, item));
end

  0 Comments

Sign in to comment.


Jos (10584)
Jos (10584) on 25 Feb 2013
I seems that only the last character of the string is of importance:
LIST = {'140111','140aa4','999cc3','123ZZ1','145xxx'}
TYPE = cellfun(@(x) x(numel(x))-'0', LIST)
TYPE(~ismember(TYPE,[1 2 3])) = 4

  0 Comments

Sign in to comment.


Azzi Abdelmalek
Azzi Abdelmalek on 25 Feb 2013
Edited: Azzi Abdelmalek on 25 Feb 2013
yourlist={'140221','140214','140111','140223','140544','140773'}
type1=yourlist(cell2mat(cellfun(@(x) ~isempty(regexp(x,'\<140\d\d1\>')),yourlist,'un',0)))
type2=yourlist(cell2mat(cellfun(@(x) ~isempty(regexp(x,'\<140\d\d2\>')),yourlist,'un',0)))
type3=yourlist(cell2mat(cellfun(@(x) ~isempty(regexp(x,'\<140\d\d3\>')),yourlist,'un',0)))
type4=yourlist(cell2mat(cellfun(@(x) ~isempty(regexp(x,'\<140\d\d4\>')),yourlist,'un',0)))

  0 Comments

Sign in to comment.

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!