Prepare Text for Matching

Process text to improve exact, quasi-exact and/or lexical text matching (e.g. "lexical cleaning").

Usage

lexiclean(x, mod = "all")

Arguments

x

A character vector.

mod

Desired modifications, as a character string:

• "all" : Use all modifications.

• "lc" : Convert to lowercase.

• "roman" : Convert all numbers to roman numerals.

• "rm_space" : Remove all spaces, defined by [:space:], see regex().

• "rm_punct" : Remove all punctuation, defined by [:punct:], see regex().

Value

A character vector with specified modifications applied.

Examples

x <- c("disease", "X-linked exudative vitreoretinopathy 2", "hepatitis D",
       "dilated cardiomyopathy 1FF", "chromosome 15q25 deletion syndrome",
       "spinocerebellar ataxia type 19/22", "Addison's disease",
       "disease type II", "B-lymphoblastic leukemia/lymphoma, BCR-ABL1–like")

lexiclean(x)
#> [1] "disease"                                  
#> [2] "xlinkedexudativevitreoretinopathyii"      
#> [3] "hepatitisd"                               
#> [4] "dilatedcardiomyopathyiff"                 
#> [5] "chromosomexvqxxvdeletionsyndrome"         
#> [6] "spinocerebellarataxiatypexixxxii"         
#> [7] "addisonsdisease"                          
#> [8] "diseasetypeii"                            
#> [9] "blymphoblasticleukemialymphomabcrablilike"
lexiclean(x, "roman")
#> [1] "disease"                                         
#> [2] "X-linked exudative vitreoretinopathy II"         
#> [3] "hepatitis D"                                     
#> [4] "dilated cardiomyopathy IFF"                      
#> [5] "chromosome XVqXXV deletion syndrome"             
#> [6] "spinocerebellar ataxia type XIX/XXII"            
#> [7] "Addison's disease"                               
#> [8] "disease type II"                                 
#> [9] "B-lymphoblastic leukemia/lymphoma, BCR-ABLI–like"