Source Lines from a File

Sources specific lines from a file

Usage

source_lines(file, lines, ...)

Arguments

file

A character string giving the path to the file to be sourced.

lines

A numeric vector of line numbers to be sourced.

...

Additional arguments to be passed to source.

Value

The result of source.

See also

This function is borrowed from christophergandrud

Examples

test_file <- tempfile(fileext = ".R")
writeLines(c("# Line 1", "2+2", "# Line 3"), test_file)
source_lines(test_file, 1:2, echo=TRUE)
#> 
#> > 2 + 2
#> [1] 4