Let's say that I'm trying to write a functions that will allow me to
automate a process
where I examine all possible combinations of various string groupings. Each
time I run
the one function, I want to include the new values to the end of a data
frame. The data
frame will basically be one column with a lot of rows.
roots <- c("car insurance", "auto insurance")
prefix <- c("cheap", "budget")
suffix <- c("rate", "rates")
one <- function(x, y, z=0) {
nu <- do.call(paste, expand.grid(x, y, z))
mydf <- data.frame(nu)
print(mydf)
}
one(roots, suffix2)
one(prefix, roots)
one(prefix, roots, suffix2)
The code above just replaces each value in the data frame each time I run
the one function.
How can I add the new values to the end of the data frame?
Help!
I'm running R 2.13 on Ubuntu 10.10
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