Plot of the flare class (in W m⁻², on the left) and CME speed (in km s⁻¹, on the right) of samples associated with different radio burst types vs. the radio wavelength in the period 1996–2016. No restriction with respect to helio-longitude or proton intensity is imposed. Type II behavior is shown with black dashed line, type III − with think black line, type IV − with thick gray line.