Re: request a new feature in fuzzystrmatch

Hi Atri,

I also talked to the author of fuzzystrmatch, he also thinks it is a
good feature.
Thanks,

Liming

On 5/17/2013 8:21 AM, Liming Hu wrote:
> Hi Atri,
>
> Thanks for the quick response.
>
> levenshtein edit distance defines operations of: insertion, deletion,
> modification.
> Levenshtein-Damerau edit distance defines operations of: insertion,
> deletion, modification
> and transposition (
> it will be two operations in levenshtein edit distance:
> one deletion, and one insertion,
> ).
>
> In spelling checker/corrector, i.e.
> levenshtein('cta', 'cat') will return 2.
> but Levenshtein-Damerau('cta', 'cat') will return 1.
> if the maximum error is 1, we can not get 'cat'.
>
> In practice, Levenshtein-Damerau is more widely used than Levenshtein.
> I believe you notice "Google automated search suggestions", they use
> Levenshtein-Damerau.
>
> Thanks,
>
> Liming
>
>
> On 5/17/2013 3:00 AM, Atri Sharma wrote:
>>
>> Sent from my iPad
>>
>> On 17-May-2013, at 6:11, Liming Hu <dawninghu(at)gmail(dot)com> wrote:
>>
>>> Hi,
>>>
>>> I am studying your levenshtein edit distance contribution in
>>> Postgresql.
>>>
>>> Can we add Levenshtein-Damerau edit distance since it is used in
>>> spelling checker
>>> instead of levenshtein edit distance?
>>>
>>> Levenshtein-Damerau edit distance C source code:
>>> http://stackoverflow.com/questions/10727174/dameraulevenshtein-distance-edit-distance-with-transposition-c-implementation.
>>>
>>>
>>>
>>>
>>>
>> Could you give some use cases for the same, where the proposed
>> feature does better than the current functionalities?
>>
>> Regards,
>>
>> Atri
>