I'm trying to create a function which will allow me to subset a data set
based on values of various specified variables. I also want to then
apply some other function(s) (e.g., summary).
This is what I've tried so far....
> test.fx <- function(dta, expvar, expval) {
+ newdta <- subset(dta, eval(expvar)>expval)
+ summary(newdta$eval(expvar))
+ }
>
> test.fx(fyc04s, quote(totexp04), 100)
Error in summary(newdta$eval(expvar)) : attempt to apply non-function
>
The subset works fine, but the my attempt to access the specified
variable bombs.
Is there a syntactical change I can make?
Is it better to attach newdta?
Thanks in advance for any guidance.
Marc
Marc W. Zodet, MS
Senior Health Statistician
Agency for Healthcare Research and Quality
Center for Financing, Access, and Cost Trends
301-427-1563 (Telephone)
301-427-1276 (Fax)
[EMAIL PROTECTED]
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