ed_nbs_symbol
provides an interface to query symbols of economic indicators from NBS.
ed_nbs_symbol(symbol = NULL, geo_type = NULL, freq = NULL, eng = FALSE)
symbols of NBS indicators.
geography type in NBS, including 'nation', 'province', 'city'. Default is NULL.
the frequency of NBS indicators, including 'monthly', 'quarterly', 'yearly'. Default is NULL.
logical. The language of the query results is in English or in Chinese. Default is FALSE.
# query symbol interactively
if (FALSE) {
sym = ed_nbs_symbol()}