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What do I have to do to sort strings properly in Listbox?

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Haksun Lee
Haksun Lee on 18 Jun 2012
Edited: Stephen Cobeldick on 21 Feb 2016
Hi,
While I try to figure this out, I have problems again..
To sort strings in listbox,
e.g.,I have strings below! 'p1' 'p2' 'p10' 'p12' 'p21'
To sort those strings, I tried to use sort(),
and then, result was like this..
'p1' 'p10' 'p12' 'p2' 'p21'
%%%% :-( %%%%
But, I want to sort A as, 'p1' 'p2' 'p10' 'p12' 'p21'
What do I have to do for this?
I'm looking forward to your answer!

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Haksun Lee
Haksun Lee on 25 Jun 2012
what was happened?-0-
Because there were no answers since I asked about sorting, so I re-ask same question today.
Maybe Geoff answered it, BUT I couldn't check your answers...sorry
Geoff
Geoff on 25 Jun 2012
Oh... probably... Meh, well, I'll stop being a grump and hack it out quickly again.
Haksun Lee
Haksun Lee on 25 Jun 2012
There was some misunderstanding..
Have a nice day everyone..
But I have to figure this out T.T
- Newbie programmer, H.S Lee

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Accepted Answer

Geoff
Geoff on 25 Jun 2012
Don't ask the same question just because nobody answered it yesterday. If you are impatient, write a comment on it to bump it back up. People occasionally check through old questions to see what hasn't been answered. That's also a reason to accept answers - so people who do look back on old questions know not to check those that are already accepted.
Now... code, with no explanation this time.
A = {'p1', 'p10', 'p12', 'p2', 'p21'};
N = cellfun( @str2double, regexp(A, '\d+', 'match') )
[~,I] = sort(N);
B = A(I);

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Walter Roberson
Walter Roberson on 20 Feb 2016
The problem is not the "=" in itself, the problem is that you have not defined which sequence of digits you want to extract out of the two that occur in each string. If you want to extract the first set, then use
N = cellfun( @str2double, regexp(A, '\d+', 'match', 'once') );
Stephen Cobeldick
Stephen Cobeldick on 20 Feb 2016
@Soroush Asarzadeh: This is trivial using my FEX submission natsort:
>> A = {'p10=34', 'p4=10', 'p2=11', 'p3=90', 'p21=55'};
>> natsort(A)
ans =
'p2=11' 'p3=90' 'p4=10' 'p10=34' 'p21=55'
Soroush Asarzadeh
Soroush Asarzadeh on 20 Feb 2016
@Walter thanks, it works now! @Stephan thank u for your answer

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