gapply: Apply Grid

In exams.forge: Support for Compiling Examination Tasks using the 'exams' Package

Apply Grid

Description

Runs all combinations of elements in ... as parameters of FUN (grid apply). I(.) can be used to avoid that an element is interpreted as a grid value. If an error occurs, then the result of FUN will not be stored. You may notice missing indices in the returning list.

Usage

gapply(FUN, ..., .simplify = TRUE)

apply_grid(FUN, ..., .simplify = TRUE)

Arguments

FUN	function or character: a string naming the function to be called
...	list: of arguments of the function to be called. The names attribute of args returns the argument names
.simplify	logical: should the result be simplified to a data frame (if possible)? (default: TRUE)

Value

A list or a data frame with the function results.

Examples

# 8 function calls: sum(1,3,5), sum(1,3,6), ..., sum(2,4,6)
gapply("sum", 1:2, 3:4, 5:6)
# 4 function calls: sum(1,3,5:6), sum(1,4,5:66), ..., sum(2,4,5:6)
gapply("sum", 1:2, 3:4, I(5:6))

exams.forge documentation built on Sept. 11, 2024, 5:32 p.m.