## Not run:
# require(CorReg)
# n=15
# x=1:n
# y=cbind(c(rnorm(5,0,1),rnorm(5,1,1),rnorm(5,2,1)),
# c(rnorm(5,0,1),rnorm(5,1,1),rnorm(5,4,1)),
# c(rnorm(5,1,3),rnorm(5,1,2),rnorm(5,1,1)))
# matplot_zone(x,y,type="l",what=which.max,main="Highest curve")
# #background color follows color of the highest curve
# matplot_zone(x,y,type="l",what=which.min,main="Lowest curve")
# #background color follows color of the lowest curve
#
# ## End(Not run)
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