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. |
|---|---|
| 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. |