Calculate the first heat day
# S4 method for WeaAna firstHeatDay( object, stress = waGetPara("extreme$maxt$hot.day$value"), yrange = waGetPara("yrange"), conse = 1, offset = 0 )
object | A WeaAna object. |
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stress | The stress temperature for frost |
yrange | The year range for statistics |
conse | Number of consecutive days |
offset | offset The first heat day of each year will return if prob equal to NULL. |