Hindex function

h-index calculation

It calculates the authors' h-index and its variants.

Hindex(M, field = "author", elements = NULL, sep = ";", years = Inf)

Arguments

• M: is a bibliographic data frame 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.
• field: is character. It can be equal to c("author", "source"). field indicates if H-index have to be calculated for a list of authors or for a list of sources. Default value is field = "author".
• elements: is a character vector. It contains the authors' names list or the source list for which you want to calculate the H-index. When the field is "author", the argument has the form C("SURNAME1 N","SURNAME2 N",...), in other words, for each author: surname and initials separated by one blank space. If elements=NULL, the function calculates impact indices for all elements contained in the data frame. i.e for the authors SEMPRONIO TIZIO CAIO and ARIA MASSIMO elements argument is elements = c("SEMPRONIO TC", "ARIA M").
• sep: is the field separator character. This character separates authors in each string of AU column of the bibliographic data frame. The default is sep = ";".
• years: is a integer. It indicates the number of years to consider for Hindex calculation. Default is Inf.

Returns

an object of class "list". It contains two elements: H is a data frame with h-index, g-index and m-index for each author; CitationList is a list with the bibliographic collection for each author.

Examples

### EXAMPLE 1: ###
 
data(scientometrics, package = "bibliometrixData")

authors <- c("SMALL H", "CHEN DZ")

Hindex(scientometrics, field = "author", elements = authors, sep = ";")$H

Hindex(scientometrics, field = "source", elements = "SCIENTOMETRICS", sep = ";")$H

### EXAMPLE 2: Garfield h-index###
 
data(garfield, package = "bibliometrixData")

indices=Hindex(garfield, field = "author", elements = "GARFIELD E", years=Inf, sep = ";")

# h-index, g-index and m-index of Eugene Garfield
indices$H

# Papers and total citations
head(indices$CitationList[[1]])

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.