Classification error of artificial neural network models with an
increasing number of hidden neurons: models were trained on data
from Australian and South American sites to predict disease severity
class at South American () and Australian () sites, respectively; other
models for Samford (), Southedge (), Springmount (), Campo
Grande (), Planaltina (), Carimagua () and Caquetá (×) were trained
on data for all sites except the site being used for prediction. Broken
and solid lines represent models developed with (a) and without (b)
data from the Caquetá site, respectively.