rdply {plyr} | R Documentation |
Evalulate expression n times then combine results into a data frame
rdply(.n, .expr, .progress = "none")
.n |
number of times to evaluate the expression |
.expr |
expression to evaluate |
.progress |
name of the progress bar to use, see
|
This function runs an expression multiple times, and
combines the result into a data frame. If there are no
results, then this function returns a data frame with
zero rows and columns (data.frame()
). This
function is equivalent to replicate
, but
will always return results as a data frame.
a data frame
Hadley Wickham (2011). The Split-Apply-Combine Strategy for Data Analysis. Journal of Statistical Software, 40(1), 1-29. http://www.jstatsoft.org/v40/i01/.
rdply(20, mean(runif(100))) rdply(20, each(mean, var)(runif(100))) rdply(20, data.frame(x = runif(2)))