R/write_omv.R
write_omv.RdWrite files to be used with the statistical spreadsheet 'jamovi' (https://www.jamovi.org)
write_omv(dtaFrm = NULL, fleOut = "", retDbg = FALSE)Data frame to be exported (default: NULL)
Name / position of the output file to be generated ("FILENAME.omv"; default: "")
Whether to return a list with debugging information (see Value; default: FALSE)
a list (if retDbg == TRUE), containing the meta data (mtaDta, metadata.json in the OMV-file), the extended data (xtdDta, xdata.json in the OMV-file) and the original data frame (dtaFrm)
jamovi has a specific measurement level / type "ID" (in addition to the "standard" ones "Nominal", "Ordinal", and "Continuous"). "ID" is used for columns that contain some form of ID (e.g., a
participant code). In order to set a variable of your data frame to "ID", you have to manually set an attribute jmv-id (e.g., attr(dtaFrm$column, "jmv-id") = TRUE).
if (FALSE) {
library(jmvReadWrite);
# use the data set "ToothGrowth" and, if it exists, write it as
# jamovi-file using write_omv()
data("ToothGrowth");
fleOMV <- paste0(tempfile(), ".omv");
# typically, one would use a "real" file name instead of tempfile(),
# e.g., "Data1.omv"
dtaDbg = write_omv(ToothGrowth, fleOMV, retDbg = TRUE);
print(names(dtaDbg));
# the print-function is only used to force devtools::run_examples()
# to show output
# -> "mtaDta" "xtdDta" "dtaFrm"
# returns a list with the metadata (mtaDta, e.g., column and data type),
# the extended data (xtdDta, e.g., variable lables), and the data frame
# (dtaFrm) the purpose of these variables is merely for checking (under-
# standing the file format) and debugging
# check whether the file was written to the disk, get the file informa-
# tion (size, etc.) and delete the file afterwards
print(list.files(dirname(fleOMV), basename(fleOMV)));
# -> "file[...].omv" ([...] is a combination of random numbers / characters
print(file.info(fleOMV)$size);
# -> 2448 (size may differ on different OSes)
unlink(fleOMV);
}