bibliometrix (version 2.3.2)

fieldByYear: 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 = 1,
  n.items = 5, labelsize = 5, 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 maximun number of items per year to include in the plot.

labelsize

is an integer. It indicates the label size in the plot. Default is labelsize=5.

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

See Also

biblioAnalysis function for bibliometric analysis

summary method for class 'bibliometrix'

Examples

# NOT RUN {
data(management)
timespan=c(2005,2015)
res <- fieldByYear(management, field = "ID", timespan = timespan, 
                    min.freq = 5, n.items = 5, graph = TRUE)

# }