Query yield data and transform stats to SE by calling fetch.stats2se;

Function to query yields data from database for specific species and convert stat to SE

query.yields(trait = "yield", spstr, extra.columns = "", con = NULL,
  ids_are_cultivars = FALSE, ...)

Arguments

trait	yield trait to query
spstr	species to query for yield data
extra.columns	other query terms to pass in. Optional
con	database connection
ids_are_cultivars	if TRUE, spstr contains cultivar IDs, otherwise they are species IDs
...	extra arguments

See also

used in query.trait.data; fetch.stats2se; transformstats performs transformation calculations