# Load PGR passport database
GN <- GN1000
# Specify as a vector the database fields to be used
GNfields <- c("NationalID", "CollNo", "DonorID", "OtherID1", "OtherID2")
# Clean the data
GN[GNfields] <- lapply(GN[GNfields], function(x) DataClean(x))
## Not run:
#
# # Generate KWIC index
# GNKWIC <- KWIC(GN, GNfields)
# GNKWIC
#
# # Retrieve the KWIC index from the KWIC object
# KWIC <- GNKWIC[[1]]
#
# # Retrieve the keyword frequencies from the KWIC object
# KeywordFreq <- GNKWIC[[2]]
#
# # Show error in case of duplicates and NULL values
# # in the primary key/ID field "NationalID"
# GN[1001:1005,] <- GN[1:5,]
# GN[1001,3] <- ""
# GNKWIC <- KWIC(GN, GNfields)
# ## End(Not run)
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