parameters to be passed to xyplot(). locol and lolwd are the line color and width for the loess line.
Value
object of class "trellis".
References
R. B. Cleveland, W. S. Cleveland, J. E. McRae, and I. Terpenning (1990) STL: A Seasonal-Trend Decomposition Procedure Based on Loess. Journal of Official Statistics, 6, 3--73.