Returns a list of available series from the Ipeadata API.
available_series(language = c("en", "br"), label = TRUE)A data frame containing the Ipeadata code, name, theme, source, frequency, last update, and activity status of available series.
A character string specifying the language. Available
options are English ("en", default) and Brazilian Portuguese ("br").
Logical. If TRUE (default), variable labels are added to
the output data frame using sjlabelled::set_label().