fieldByYear: Field Tag distribution by Year
In bibliometrix: Comprehensive Science Mapping Analysis

fieldByYear

R Documentation

Field Tag distribution by Year

Description

It calculates the median year for each item of a field tag.

Usage

fieldByYear(
  M,
  field = "ID",
  timespan = NULL,
  min.freq = 2,
  n.items = 5,
  labelsize = NULL,
  remove.terms = NULL,
  synonyms = NULL,
  dynamic.plot = FALSE,
  graph = TRUE
)

Arguments

`M`	is a bibliographic data frame obtained by `convert2df` function.
`field`	is a character object. It indicates one of the field tags of the standard ISI WoS Field Tag codify.
`timespan`	is a vector with the min and max year. If it is = NULL, the analysis is performed on the entire period. Default is `timespan = NULL`.
`min.freq`	is an integer. It indicates the min frequency of the items to include in the analysis
`n.items`	is an integer. I indicates the maximum number of items per year to include in the plot.
`labelsize`	is deprecated argument. It will be removed in the next update.
`remove.terms`	is a character vector. It contains a list of additional terms to delete from the documents before term extraction. The default is `remove.terms = NULL`.
`synonyms`	is a character vector. Each element contains a list of synonyms, separated by ";", that will be merged into a single term (the first word contained in the vector element). The default is `synonyms = NULL`.
`dynamic.plot`	is a logical. If TRUE plot aesthetics are optimized for plotly package.
`graph`	is logical. If TRUE the function plots Filed Tag distribution by Year graph. Default is `graph = TRUE`.

Value

The function fieldByYear returns a list containing threeobjects:

`df`		is a data frame
`df_graph`		is a data frame with data used to build the graph
`graph`		a ggplot object

Examples

data(management, package = "bibliometrixData")
timespan=c(2005,2015)
res <- fieldByYear(management, field = "ID", timespan = timespan, 
                    min.freq = 5, n.items = 5, graph = TRUE)

bibliometrix documentation built on July 3, 2024, 5:07 p.m.