Field Tag distribution by Year
It calculates the median year for each item of a field tag.
fieldByYear( M, field = "ID", timespan = NULL, min.freq = 2, n.items = 5, labelsize = NULL, remove.terms = NULL, synonyms = NULL, dynamic.plot = FALSE, graph = TRUE )
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 analysisn.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.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 |
data(management, package = "bibliometrixData") timespan=c(2005,2015) res <- fieldByYear(management, field = "ID", timespan = timespan, min.freq = 5, n.items = 5, graph = TRUE)
biblioAnalysis function for bibliometric analysis
summary method for class 'bibliometrix'
Useful links