duplicatedMatching {bibliometrix}R Documentation

Searching of duplicated records in a bibliographic database


Search duplicated records in a dataframe.


duplicatedMatching(M, Field = "TI", exact = FALSE, tol = 0.95)



is the bibliographic data frame.


is a character object. It indicates one of the field tags used to identify duplicated records. Field can be equal to one of these tags: TI (title), AB (abstract), UT (manuscript ID).


is logical. If exact = TRUE the function searches duplicates using exact matching. If exact=FALSE, the function uses the restricted Damerau-Levenshtein distance to find duplicated documents.


is a numeric value giving the minimum relative similarity to match two manuscripts. Default value is tol = 0.95. To use the restricted Damerau-Levenshtein distance, exact argument has to be set as FALSE.


A bibliographic data frame is obtained by the converting function convert2df. It is a data matrix with cases corresponding to manuscripts and variables to Field Tag in the original SCOPUS and Clarivate Analytics WoS file. The function identifies duplicated records in a bibliographic data frame and deletes them. Duplicate entries are identified through the restricted Damerau-Levenshtein distance. Two manuscripts that have a relative similarity measure greater than tol argument are stored in the output data frame only once.


the value returned from duplicatedMatching is a data frame without duplicated records.

See Also

convert2df to import and convert an WoS or SCOPUS Export file in a bibliographic data frame.

biblioAnalysis function for bibliometric analysis.

summary to obtain a summary of the results.

plot to draw some useful plots of the results.


data(scientometrics, package = "bibliometrixData")


newM <- duplicatedMatching(M, Field = "TI", exact=FALSE, tol = 0.95)


[Package bibliometrix version 3.1.4 Index]