bibliometrix (version 4.3.0)

bradford: Bradford's law

Description

It estimates and draws the Bradford's law source distribution.

Usage

bradford(M)

Value

The function bradford returns a list containing the following objects:

table		a dataframe with the source distribution partitioned in the three zones
graph		the source distribution plot in ggplot2 format

Arguments

M

is a bibliographic dataframe.

Details

Bradford's law is a pattern first described by (Samuel C. Bradford, 1934) that estimates the exponentially diminishing returns of searching for references in science journals.

One formulation is that if journals in a field are sorted by number of articles into three groups, each with about one-third of all articles, then the number of journals in each group will be proportional to 1:n:n2.

Reference:
Bradford, S. C. (1934). Sources of information on specific subjects. Engineering, 137, 85-86.

See Also

biblioAnalysis function for bibliometric analysis

summary method for class 'bibliometrix'

Examples

if (FALSE) {
data(management, package = "bibliometrixData")

BR <- bradford(management)
}