Tries reading a cached dataframe result from the filename on the right side. If the file is missing, generate the dataframe using the function call on the left side and write the result to the file. If "tgutil.cache" option is FALSE, right side would be always recumputed.

Tries reading a cached dataframe result from the filename on the right side. If the file is missing, generate the dataframe using the function call on the left side and write the result to the file. If "tgutil.cache" option is FALSE, right side would be always recumputed.

call %cache_df% fname

Arguments

call

function call

fname

filename

Examples

temp_file <- tempfile(fileext = ".tsv")
calc_mtcars_cyl <- function(cyl) {
    message("calculating")
    as.data.frame(mtcars[mtcars$cyl == cyl, ])
}

# Call "calc_mtcars_cyl" function
res1 <- calc_mtcars_cyl(6) %cache_df% temp_file
#> calculating

# Load cached file
res2 <- calc_mtcars_cyl(6) %cache_df% temp_file
#> Using cached dataframe from '/tmp/RtmpISImil/file167762cf44c09.tsv'