rdply: Replicate expression and return results in a data frame.

In plyr: Tools for Splitting, Applying and Combining Data

Replicate expression and return results in a data frame.

Description

Evaluate expression n times then combine results into a data frame

Usage

rdply(.n, .expr, .progress = "none", .id = NA)

Arguments

.n	number of times to evaluate the expression
.expr	expression to evaluate
.progress	name of the progress bar to use, see create_progress_bar
.id	name of the index column. Pass NULL to avoid creation of the index column. For compatibility, omit this argument or pass NA to use ".n" as column name.

Details

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.

Value

a data frame

References

Hadley Wickham (2011). The Split-Apply-Combine Strategy for Data Analysis. Journal of Statistical Software, 40(1), 1-29. https://www.jstatsoft.org/v40/i01/.

Examples

rdply(20, mean(runif(100)))
rdply(20, each(mean, var)(runif(100)))
rdply(20, data.frame(x = runif(2)))

plyr documentation built on Oct. 2, 2023, 9:07 a.m.