"David A. van Leeuwen" <[EMAIL PROTECTED]> writes:
> Hi,
>
> i am working with large data frames with many dependend variables. I
> want to write some functions that will allow me to quickly select
> variables from the frame and plot them in various colors depending on
> factor columns, possibly selecting rows according to factor
> conditions. In order to do this in a nice function, i need to
> understand how to work with a column name in the body of a
> function. To simplify my problem, how do i write a function with a
> body like
>
>
> scatter.plot <- function (data, x, y) {
> plot(data$x, data$y)
> }
Use
plot(data[[x]], data[[y]])
instead
--
Douglas Bates [EMAIL PROTECTED]
Statistics Department 608/262-2598
University of Wisconsin - Madison http://www.stat.wisc.edu/~bates/
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