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Loading Data into Memory

loading-data-into-memory.Rmd
library(dv.loader)

Note: use_wd = TRUE can be used to source from local folder. Just set your working directory before using with setwd(), or use an explicit path in sub_dir.

Usage: load_data() 

test_data_path <- "../tests/testthat/inst/extdata"
data_list <- load_data(
  sub_dir = test_data_path,
  file_names = "dummyads2",
  use_wd = TRUE
)


class(data_list)
#> [1] "list"

class(data_list[["dummyads2"]])
#> [1] "tbl_df"     "tbl"        "data.frame"

head(data_list[["dummyads2"]])
#>     STUDYID       USUBJID SUBJID TRTFL PPROTFL TRT01PNDC TRT01PN
#> 1 test-0001 test-0001-101    101     Y       Y   BI 10mg   50100
#> 2 test-0001 test-0001-101    101     Y       Y   BI 10mg   50100
#> 3 test-0001 test-0001-101    101     Y       Y   BI 10mg   50100
#> 4 test-0001 test-0001-101    101     Y       Y   BI 10mg   50100
#> 5 test-0001 test-0001-102    102     Y       Y   Placebo    2000
#> 6 test-0001 test-0001-102    102     Y       Y   Placebo    2000

Get the dataframe’s metadata through its attributes:

attr(data_list[["dummyads2"]], "meta")
#>   size isdir mode               mtime               ctime               atime
#> 1  449 FALSE  644 2024-07-08 05:22:03 2024-07-08 05:22:03 2024-07-08 05:22:03
#>                                                                              path
#> 1 /__w/dv.loader/dv.loader/vignettes/../tests/testthat/inst/extdata/dummyads2.RDS
#>   file_name
#> 1 dummyads2