Introduction to the charlatan package

charlatan makes realistic looking fake data, inspired from and borrowing some code from Python’s faker

Why would you want to make fake data that looks real? Here’s some possible use cases to give you a sense for what you can do with this package:

Students in a classroom setting learning any task that needs a dataset.
People doing simulations/modeling that need some fake data
Generate fake dataset of users for a database before actual users exist
Complete missing spots in a dataset
Generate fake data to replace sensitive real data with before public release
Create a random set of colors for visualization
Generate random coordinates for a map
Get a set of randomly generated DOIs (Digital Object Identifiers) to assign to fake scholarly artifacts
Generate fake taxonomic names for a biological dataset
Get a set of fake sequences to use to test code/software that uses sequence data

See the Creating realistic data vignette for a few realistic examples.

Contributing

See the Contributing to charlatan vignette.

Package API

Low level interfaces: All of these are R6 objects that a user can initialize and then call methods on. These contain all the logic that the below interfaces use.
High level interfaces: There are high level functions prefixed with ch_*() that wrap low level interfaces, and are meant to be easier to use and provide an easy way to make many instances of a thing.
ch_generate() - generate a data.frame with fake data, choosing which columns to include from the data types provided in charlatan
fraudster() - single interface to all fake data methods, - returns vectors/lists of data - this function wraps the ch_*() functions described above

Install

Stable version from CRAN

install.packages("charlatan")

Development version from Github

remotes::install_github("ropensci/charlatan")

library("charlatan")

high level function

… for all fake data operations

x <- fraudster()
x$job()
#> [1] "Engineer, electrical"
x$name()
#> [1] "Kayleigh Monahan DVM"
x$job()
#> [1] "Pilot, airline"
x$color_name()
#> [1] "Lime"

locale support

Here we create 3 jobs, for different locales:

English USA
French, France
Croatian, Croatia
Ukrainian, Ukraine
Chinese, Taiwan

ch_job(locale = "en_US", n = 3)
#> [1] "Volunteer coordinator" "Herpetologist"         "Accountant, chartered"
ch_job(locale = "fr_FR", n = 3)
#> [1] "Orfèvre"    "Hydrologue" "Acheteur"
ch_job(locale = "hr_HR", n = 3)
#> [1] "Graditelj orgulja"                      
#> [2] "Agent posredovanja u prometu nekretnina"
#> [3] "Kondukter"
ch_job(locale = "uk_UA", n = 3)
#> [1] "Маркетолог"   "Мінералог"    "Реабілітолог"
ch_job(locale = "zh_TW", n = 3)
#> [1] "電機工程技術員"   "營養師"           "船長／大副／船員"

For colors:

ch_color_name(locale = "en_US", n = 3)
#> [1] "DarkOliveGreen" "LightSalmon"    "Thistle"
ch_color_name(locale = "uk_UA", n = 3)
#> [1] "Помаранчевий" "Лляний"       "Індиго"

generate a dataset

ch_generate()
#> # A tibble: 10 × 3
#>    name                     job                          phone_number       
#>    <chr>                    <chr>                        <chr>              
#>  1 Ms. Brittanie Stroman MD Immigration officer          +58(3)6160229409   
#>  2 Eric Kerluke Jr.         Gaffer                       05347580498        
#>  3 Anita Tremblay           Producer, radio              668.422.7931x283   
#>  4 Vera Larkin DVM          Local government officer     293-635-9047x0249  
#>  5 Mrs. Ressie Will DDS     Horticulturist, amenity      (878)439-6116x19195
#>  6 Carmen Lemke             Equities trader              973-715-2493       
#>  7 Izaiah Lakin             Doctor, general practice     702.830.3123       
#>  8 Jacklyn Brekke           Proofreader                  (705)349-3960x82404
#>  9 Dr. Roxanne Torp         Garment/textile technologist 321.934.9589       
#> 10 Ruby Spinka DVM          Horticultural consultant     503-967-7869

ch_generate("job", "phone_number", n = 30)
#> # A tibble: 30 × 2
#>    job                                         phone_number       
#>    <chr>                                       <chr>              
#>  1 Therapist, music                            743.002.1565       
#>  2 Exercise physiologist                       +10(4)1313533404   
#>  3 Interpreter                                 836-997-7035       
#>  4 Soil scientist                              1-001-827-7147     
#>  5 Animal technologist                         (429)111-1475x26814
#>  6 Chief of Staff                              040-140-4256x256   
#>  7 Therapist, art                              (635)279-5941      
#>  8 Teacher, early years/pre                    (100)069-9554      
#>  9 Armed forces training and education officer 219-471-3844       
#> 10 IT sales professional                       997.734.2727       
#> # ℹ 20 more rows

Data types, localized

We can create locale specific versions of:

Colors
Companies
Elements (of the periodic table)
Files
Internet
Jobs
Lorem
Persons
Phone numbers
Social Security Numbers
Taxonomies
UserAgent

Examples:

person name

ch_name()
#> [1] "Che Hoppe"

ch_name(10)
#>  [1] "Miss Alberta Kshlerin" "Wardell Stokes"        "Helen Ebert"          
#>  [4] "Delcie Rosenbaum"      "Wright Wintheiser"     "Leopold Hegmann"      
#>  [7] "Yadira Welch DVM"      "Janene Pagac"          "Edison Hansen-Rowe"   
#> [10] "Cordelia Halvorson"

phone number

ch_phone_number()
#> [1] "(730)195-8944x27065"

ch_phone_number(10)
#>  [1] "254.942.6135x541"     "(988)645-7765x892"    "(471)118-2588x20897" 
#>  [4] "04071271296"          "06950028308"          "587.130.2480x5622"   
#>  [7] "818-636-6401"         "(321)719-7058x863"    "1-427-451-7266x96664"
#> [10] "00476834167"

job

ch_job()
#> [1] "Engineering geologist"

ch_job(10)
#>  [1] "Tourist information centre manager"              
#>  [2] "Artist"                                          
#>  [3] "Television production assistant"                 
#>  [4] "Dancer"                                          
#>  [5] "Magazine features editor"                        
#>  [6] "Administrator, charities/voluntary organisations"
#>  [7] "Immunologist"                                    
#>  [8] "Environmental manager"                           
#>  [9] "Magazine features editor"                        
#> [10] "Financial trader"

Data types, universal

Some data types are not localized (arguably the files and user_agents, are mostly universal too).

Currency
credit card
Sequence (DNA)
Numerics (doubles, integers, numbers from a distribution; uniform, normal, log-normal, and beta)
Miscellaneous (booleans, language codes)
DOIs (Digital Object Identifiers, used in scientific journals)
Coordinates (GPS coordinates)

currency

ch_currency(3)
#> [1] "JEP" "LYD" "ZWD"

credit cards

ch_credit_card_provider()
#> [1] "Diners Club / Carte Blanche"
ch_credit_card_provider(n = 4)
#> [1] "JCB 16 digit"                "Diners Club / Carte Blanche"
#> [3] "Diners Club / Carte Blanche" "Diners Club / Carte Blanche"

ch_credit_card_number()
#> [1] "3337107052969222010"
ch_credit_card_number(n = 10)
#>  [1] "4936977479695155"    "3009894902217436"    "3429872376096912"   
#>  [4] "3724442383911936"    "3158495657188419054" "3052977924522649"   
#>  [7] "4998399286256"       "3112853654630882241" "3459332260899825"   
#> [10] "3412485666963607"

ch_credit_card_security_code()
#> [1] "343"
ch_credit_card_security_code(10)
#>  [1] "850"  "290"  "656"  "429"  "404"  "957"  "374"  "1640" "371"  "693"

Missing data

charlatan makes it very easy to generate fake data with missing entries. First, you need to run MissingDataProvider() and then make an appropriate make_missing() call specifying the data type to be generated. This method picks a random number (N) of slots in the input make_missing vector and then picks N random positions that will be replaced with NA matching the input class.

testVector <- MissingDataProvider$new()

character strings

testVector$make_missing(x = ch_generate()$name)
#>  [1] "Dr. Brook Gutkowski DVM" NA                       
#>  [3] "Dejon Buckridge PhD"     NA                       
#>  [5] NA                        NA                       
#>  [7] NA                        NA                       
#>  [9] NA                        NA

numeric data

testVector$make_missing(x = ch_integer(10))
#>  [1] 794 807  NA 294 325 442 780  NA 787 786

logicals

set.seed(123)
testVector$make_missing(x = sample(c(TRUE, FALSE), 10, replace = TRUE))
#>  [1]  TRUE    NA    NA FALSE  TRUE    NA FALSE FALSE    NA  TRUE

Messy data

Real data is messy, right? charlatan makes it easy to create messy data. This is still in the early stages so is not available across most data types and languages, but we’re working on it.

For example, create messy names:

ch_name(50, messy = TRUE)
#>  [1] "Destiney Dicki"            "Mrs. Freddie Pouros DDS"  
#>  [3] "Ms. Jada Lesch"            "Inga Dach"                
#>  [5] "Keyshawn Schaefer"         "Ferdinand Bergstrom"      
#>  [7] "Justen Simonis"            "Ms. Doloris Stroman DVM"  
#>  [9] "Mrs. Ermine Heidenreich"   "Marion Corwin"            
#> [11] "Jalen Grimes"              "Mr. Sullivan Hammes IV"   
#> [13] "Adrien Vandervort-Dickens" "Dr. Sharif Kunde"         
#> [15] "Marlena Reichert PhD"      "Mr. Brandan Oberbrunner"  
#> [17] "Lloyd Adams III"           "Randy Ziemann"            
#> [19] "Gina Sanford"              "Cornell Funk"             
#> [21] "Yadiel Collier"            "Kamryn Johnson"           
#> [23] "Tyesha Schmeler"           "Ernie Hegmann-Graham"     
#> [25] "Zackery Runolfsdottir"     "Cleveland Predovic"       
#> [27] "Melvyn Hickle"             "Larry Nienow IV"          
#> [29] "Vilma Rutherford"          "Wiliam Ziemann-Fadel"     
#> [31] "Mrs. Kathy Halvorson"      "Mirtie Harvey-Shanahan"   
#> [33] "Eliezer Pfeffer"           "Dr. Shep Buckridge"       
#> [35] "Kyree Kutch"               "Ms. Delpha Grant"         
#> [37] "Ms. Icie Crooks"           "Loney Jenkins-Lindgren"   
#> [39] "Shania Donnelly DVM"       "Dr. Patric Veum"          
#> [41] "Amirah Rippin DVM"         "Randle Hilpert"           
#> [43] "Soren Dare"                "Roderic Walter"           
#> [45] "Farah Daugherty MD"        "Marva Crooks"             
#> [47] "Ryland Ledner"             "Girtha Harvey DDS"        
#> [49] "Staci Spencer"             "Mr. Olan Bernhard"

Right now only suffixes and prefixes for names in en_US locale are supported. Notice above some variation in prefixes and suffixes.