I am trying to change the attributes of the lowess lines fit to an
xyplot command, but have been unsuccessful in my search of the online
help. Right now, both the points and lowess line come out in the same
color (blue). I am unsure how I can change the properties of the lowess
line separately.
 
xyplot (
  SnowLineElevation ~ Year | Model,
  data = data,
  ylim = c(0,1800),
  type = c('p','smooth'),
  col = 'blue',
  pch = 21,
  xlab = 'Year',
  ylab = 'Snowline Elevation [m]'
)
 
Any help would be much appreciated,
 
Dave

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