bibliometrix (version 1.4)

metaTagExtraction: Meta-Field Tag Extraction

Description

It extracts some new useful field tags from standard ISI/SCOPUS fied tag codify.

Usage

metaTagExtraction(M, Field = "CR_AU", sep = ";")

Arguments

M

is a data frame obtained by the converting function convert2df. It is a data matrix with cases corresponding to articles and variables to Field Tag in the original ISI or SCOPUS file.

Field

is a character object. New tag exctracted from aggregated data is specified by this string. Field can be equal to one of this tags:

"CR_AU"
First Author of each cited reference	"CR_SO"
	Source of each cited reference
"AU_CO"
Country of affiliation for each co-author	"CR_AU"

sep

is the field separator character. This character separates strings in each column of the data frame. The default is sep = ";".

Value

the bibliometric data frame with a new column containing data about new field tag indicated in the argument Field.

See Also

scopus2df for converting ISO or SCPUS Export file into a data frame.

biblioAnalysis function for bibliometric analysis

Examples

# Example 1: First Authors for each cited reference

data(scientometrics)
scientometrics <- metaTagExtraction(scientometrics, Field = "CR_AU", sep = ";")
unlist(strsplit(scientometrics$CR_AU[1], ";"))


#Example 2: Source for each cited reference

data(scientometrics)
scientometrics <- metaTagExtraction(scientometrics, Field = "CR_SO", sep = ";")
unlist(strsplit(scientometrics$CR_SO[1], ";"))

#Example 3: Affiliation country for co-author

data(scientometrics)
scientometrics <- metaTagExtraction(scientometrics, Field = "AU_CO", sep = ";")
scientometrics$AU_CO[1:10]