mirror of
https://github.com/agdamsbo/REDCapCAST.git
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88 lines
2.1 KiB
R
88 lines
2.1 KiB
R
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# v0.0.0
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#' Split REDCap repeating instruments table into multiple tables
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#'
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#' This will take a raw data frame from REDCap and split it into a base table
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#' and give individual tables for each repeating instrument. Metadata
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#' is used to determine which fields should be included in each resultant table.
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#'
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#' @param records data.frame containing the records
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#' @param metadata data.frame containing the metadata
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#' @author Paul W. Egeler, M.S., GStat
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#' @examples
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#' \dontrun{
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#' library(jsonlite)
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#' library(RCurl)
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#'
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#' # Get the metadata
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#' result.meta <- postForm(
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#' api_url,
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#' token = api_token,
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#' content = 'metadata',
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#' format = 'json'
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#' )
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#'
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#' # Get the records
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#' result.record <- postForm(
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#' uri = api_url,
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#' token = api_token,
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#' content = 'record',
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#' format = 'json',
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#' type = 'flat',
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#' rawOrLabel = 'raw',
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#' rawOrLabelHeaders = 'raw',
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#' exportCheckboxLabel = 'false',
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#' exportSurveyFields = 'false',
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#' exportDataAccessGroups = 'false',
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#' returnFormat = 'json'
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#' )
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#'
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#' records <- fromJSON(result.record)
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#' metadata <- fromJSON(result.meta)
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#'
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#' REDCap_split(records, metadata)
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#' }
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#' @return a list of data.frames
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#' @export
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REDCap_split <- function(records, metadata) {
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# Check to see if there were any repeating instruments
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if (!any(names(records) == "redcap_repeat_instrument")) {
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warning("There are no repeating instruments.\n")
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return(list(records))
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}
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# Clean the metadata
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metadata <- metadata[metadata["field_type"] != "descriptive", 1:4]
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# Identify the subtables in the data
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subtables <- unique(records["redcap_repeat_instrument"])
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subtables <- subtables[subtables != ""]
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# Split the table based on instrument
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out <- split.data.frame(records, records["redcap_repeat_instrument"])
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# Delete the variables that are not relevant
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for (i in names(out)) {
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if (i == "") {
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out[[which(names(out) == "")]] <-
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out[[which(names(out) == "")]][metadata[`!`(metadata[,2] %in% subtables), 1]]
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} else {
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out[[i]] <-
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out[[i]][c(names(records[1:3]),metadata[metadata[,2] == i, 1])]
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}
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}
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return(out)
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}
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