Plot frequency distribution with horizontal bara

SHows a bar plot with words on the y-axis and frequency on the x-axis

plot_bars(df, gram.min = 1, gram.max = 1, min.freq = 25)

Arguments

df	a dataframe with paper results
gram.min	minimum number of grams
gram.max	maximum number of grams
min.freq	minimum frequency of the words to be plotted

Examples

# NOT RUN {
my_url <- make_search_url(query = "well test",
                          dc_type = "conference-paper",
                          from_year = 2017,
                          to_year   = 2018,
                          how = "all")
df <- read_multidoc(my_url)   # create a dataframe of papers
(tf <- term_frequency(df))    # create a term frequency table
min_freq <- min(head(tf, 20)$freq)
plot_bars(df, min.freq = min_freq)
# }