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209219
2005 Feb 07
2
Environment of a formula
Wise and merciful R-helpers:
I want to equip a data frame with an attribute
which specifies how to plot some of the columns.
Up to now we have been doing this by giving the data frame
a `formula' attribute, that can be passed to plot.formula.
For example
dat <- data.frame(x=1:100,y=runif(100),z=100:1)
attr(dat, "plotme") <- (z ~ x)
......
......