levenshtein-distance

问题 I need to install python Levenshtein distance package in order to use this library. Unfortunately, I am not able to install it succesfully. I usually install libraries with pip. However, this time I am getting error: [WinError 2] The system cannot find the file specified which had never happened to me before (when installing libraries). I have tried to install it using the python setup.py install but I get exactly the same error. This the output I get from the console. C:\Users\my_user

问题 I try to get the most matching color name depending on an given hex-value. For example if we have the hex-color #f00 we've to get the colorname red . '#ff0000' => 'red' '#000000' => 'black' '#ffff00' => 'yellow' I use currently the levenshtein-distance algorithm to get the closest color name, works well so far, but sometimes not as expected. For example: '#0769ad' => 'chocolate' '#00aaee' => 'mediumspringgreen' So any ideas how to get the result closer? Here's what I made to get the closest

问题 I want to use Levenshtein distance for search in Laravel. I found SQL function (saved as app/database/migrations/levenshtain.sql ): DELIMITER // CREATE FUNCTION `LEVENSHTEIN`(s1 VARCHAR(255) CHARACTER SET utf8, s2 VARCHAR(255) CHARACTER SET utf8) RETURNS int(11) DETERMINISTIC BEGIN DECLARE s1_len, s2_len, i, j, c, c_temp, cost INT; DECLARE s1_char CHAR CHARACTER SET utf8; -- max strlen=255 for this function DECLARE cv0, cv1 VARBINARY(256); SET s1_len = CHAR_LENGTH(s1), s2_len = CHAR_LENGTH(s2

问题 I have two csv file. File 1 D,FNAME,MNAME,LNAME,GENDER,DOB,snapshot 2,66M,J,Rock,F,1995,201211.0 3,David,HM,Lee,M,,201211.0 6,66M,,Rock,F,,201211.0 0,David,H M,Lee,,1990,201211.0 3,Marc,H,Robert,M,2000,201211.0 6,Marc,M,Robert,M,,201211.0 6,Marc,MS,Robert,M,2000,201211.0 3,David,M,Lee,,1990,201211.0 5,Paul,ABC,Row,F,2008,201211.0 3,Paul,ACB,Row,,,201211.0 4,David,,Lee,,1990,201211.0 4,66,J,Rock,,1995,201211.0 File 2 PID,FNAME,MNAME,LNAME,GENDER,DOB S2,66M,J,Rock,F,1995 S3,David,HM,Lee,M,1990

问题 According to the python-Levenshtein.ratio source: https://github.com/miohtama/python-Levenshtein/blob/master/Levenshtein.c#L722 it's computed as (lensum - ldist) / lensum . This works for distance('ab', 'a') = 1 ratio('ab', 'a') = 0.666666 However, it seems to break with distance('ab', 'ac') = 1 ratio('ab', 'ac') = 0.5 I feel I must be missing something very simple.. but why not 0.75 ? 回答1: Levenshtein distance for 'ab' and 'ac' as below: so alignment is: a c a b Alignment length = 2 number

问题 In PHP I am calculating Levenshtein distance using function levenshtein(). For simple characters it works as expected, but for diacritic characters like in example echo levenshtein('à', 'a'); it returns "2". In this case only one replacement has to be done, so I expect it to return "1". Am I missing something? 回答1: The default PHP levenshtein() , like many PHP functions, is not multibyte aware. So, when processing strings with Unicode characters, it handles each byte separately and changes

问题 This question already has an answer here : Levenshtein type algorithm with numeric vectors (1 answer) Closed 2 years ago . I want to compute the Levenshtein distance between two arbitrary sequences. a <- 1:100 b <- c(1, 1:100) edit_distance(a, b) == 1 I am aware of the adist function and the stringdist package, but they only work on character vectors. If the number of symbols in the sequences were small, I could just encode them as characters and use the above functions. But there will

问题 I saw there was a similar question asked about installing levenshtein in python, but was instructed to start my own by another user, so here it goes. I am runnings windows 8 64bit. When I try to install Levenshtein I get the following error. C:\Python27\Lib\site-packages\python-Levenshtein-0.10.2>python setup.py install running install running bdist_egg running egg_info writing requirements to python_Levenshtein.egg-info\requires.txt writing python_Levenshtein.egg-info\PKG-INFO writing

问题 I have Strings containing two similar looking characters. Both appear as small 'a's with an ogonek: ą ą (Note: depending on the renderer they are sometimes rendered similarily, sometimes slightly differently) However, they are different: Characteristics of the 1st character: In PostgreSQL: select ascii('ą'); ascii ------- 261 The UTF-8-encoding in Hex is: \xC4\x85 so it is a precomposed character (https://en.wikipedia.org/wiki/Precomposed_character) Characteristics of the 2nd character: In

问题 Hi please help me to solve this problem thanks in advance I defined these functions in database CREATE FUNCTION levenshtein( s1 VARCHAR(255), s2 VARCHAR(255) ) RETURNS INT DETERMINISTIC BEGIN DECLARE s1_len, s2_len, i, j, c, c_temp, cost INT; DECLARE s1_char CHAR; -- max strlen=255 DECLARE cv0, cv1 VARBINARY(256); SET s1_len = CHAR_LENGTH(s1), s2_len = CHAR_LENGTH(s2), cv1 = 0x00, j = 1, i = 1, c = 0; IF s1 = s2 THEN RETURN 0; ELSEIF s1_len = 0 THEN RETURN s2_len; ELSEIF s2_len = 0 THEN