Yearly occurrences of top keywords/terms
It calculates yearly occurrences of top keywords/terms.
KeywordGrowth(M, Tag = "ID", sep = ";", top = 10, cdf = TRUE)
M |
is a data frame obtained by the converting function |
Tag |
is a character object. It indicates one of the keyword field tags of the
standard ISI WoS Field Tag codify (ID or DE) or a field tag created by |
sep |
is the field separator character. This character separates strings in each keyword column of the data frame. The default is |
top |
is a numeric. It indicates the number of top keywords to analyze. The default value is 10. |
cdf |
is a logical. If TRUE, the function calculates the cumulative occurrences distribution. |
an object of class data.frame
data(scientometrics, package = "bibliometrixData")
topKW=KeywordGrowth(scientometrics, Tag = "ID", sep = ";", top=5, cdf=TRUE)
topKW
# Plotting results
## Not run:
install.packages("reshape2")
library(reshape2)
library(ggplot2)
DF=melt(topKW, id='Year')
ggplot(DF,aes(Year,value, group=variable, color=variable))+geom_line
## End(Not run)Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.