Nothing

```
#' Subset the desired dataset, based on a row code.
#'
#' This function is not standalone - it is called from the cr_extract function.
#'
#' @param dataset The name of a cost report alpha or numeric dataset
#' @param row The number of the row
#'
#' @return A subset of the provided dataset, subset to only having rows of the
#' correct value
#'
#'
subset_row <- function(dataset, row) {
# check that column is entered correctly
if (nchar(row) < 3 | is.na(row)) {
warning("Row number has less than 3 digits. This can produce unexpected output; please ensure that you convert to 100's (i.e. column 1 -> '100', column 1.1 -> '101'")
}
# subset the data, being flexible with how the row number is entered, since
# the cost reports are inconsistent themselves
no_zero_row <- gsub("^0*", "", row)
one_zero_row <- paste0("0", no_zero_row)
two_zero_row <- paste0("00", no_zero_row)
# sometimes row numbers are numeric instead of character. Try to convert them to
# numeric, and if it fails, silently return NA
numeric_row <- tryCatch({as.numeric(row)},
error = function(x) return(NA),
warning = function(x) return(NA))
data_subset <- dataset[dataset[[3]] %in% list(no_zero_row,
one_zero_row,
two_zero_row,
numeric_row) &
!is.na(dataset[[3]]), ]
if (nrow(data_subset) == 0) {
warning("No data found with specified row number.")
}
return(data_subset)
}
```

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