Read the function arguments and function results that were stored in RData
files (in objects args and result, respectively) by a previous
call of saveArgs.
Name of the function to load arguments and results for.
The name is used to create a search pattern for RData files in
data.dir.
Directory in which to look for RData files matching
args_<functionName>_<hhmmss>_<no>.RData. The default is the
subfolder test in tempdir().
list with as many items as there were files args_<functionName>_*
in the directory given in data.dir. Each list element has two
components: args containing the arguments that were given to
the function and result containing what the function returned.
# Define a function that stores its arguments and result with saveArgs
double <- function(x) {
result <- 2 * x
saveArgs("double", args = list(x = x), result = result)
result
}
# Set global variable TESTMODE to "activate" saveArgs() in double()
TESTMODE <- TRUE
# Call the function a couple of times
double(4)
#> [Set global variable TESTMODE to FALSE to prevent this message]
#> Save args to 'double' (y, n)?
#> [1] 8
double(-99)
#> [Set global variable TESTMODE to FALSE to prevent this message]
#> Save args to 'double' (y, n)?
#> [1] -198
double(1:10)
#> [Set global variable TESTMODE to FALSE to prevent this message]
#> Save args to 'double' (y, n)?
#> [1] 2 4 6 8 10 12 14 16 18 20
# Load what was stored behind the scenes
testdata <- loadArgs("double")
#> Error: No such file: 'test' in
#> '/var/folders/c9/jqpw9nhs7jj7vm5185nyw05h0000gn/T//RtmprftjbG'.
#> Available files:
#> 'downlit'
#> 'file13435c749744'
#> 'file134361d2d374'
#> 'file134376e6f487'
# "Deactivate" saveArgs() in double()
TESTMODE <- FALSE
# Rerun the function with the stored arguments
results <- lapply(testdata, function(x) do.call("double", x$args))
#> Error in eval(expr, envir, enclos): object 'testdata' not found
# Compare the new with the old results
identical(results, lapply(testdata, "[[", "result"))
#> Error in eval(expr, envir, enclos): object 'results' not found